Lenovo 20AA000955 Hardware Maintenance Manual Download Page 89

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Removal steps of trackpad (for NFC models)

Table 11. Screw specification (ThinkPad T490s)

Step

Screw (quantity)

Color

Torque

M2 × 2 mm, flat-head, nylon-coated (4)

Black

0.181 Nm
(1.85 kgf-cm)

Table 12. Screw specification (ThinkPad X390)

Step

Screw (quantity)

Color

Torque

M2 × 1.8 mm, flat-head, nylon-coated (4)

Silver

0.181 Nm
(1.85 kgf-cm)

Chapter 8

Removing or replacing a FRU

Summary of Contents for 20AA000955

Page 1: ...T490s and X390 Hardware Maintenance Manual ...

Page 2: ...der Appendix A Notices on page 107 First Edition March 2019 Copyright Lenovo 2019 LIMITED AND RESTRICTED RIGHTS NOTICE If data or software is delivered pursuant to a General Services Administration GSA contract use reproduction or disclosure is subject to restrictions set forth in Contract No GS 35F 05925 ...

Page 3: ...vanced startup options 31 Recovering your operating system if Windows 10 fails to start 32 Creating and using a recovery USB drive 32 Passwords 33 Power on password 33 Hard disk password 33 Supervisor password 33 How to remove the power on password 34 How to remove the hard disk password 34 Power management 35 Sleep mode 35 Hibernation mode 35 Symptom to FRU index 36 Numeric error codes 36 Error m...

Page 4: ... reader cable for ThinkPad T490s only 87 1150 Fingerprint reader bracket and fingerprint reader 88 1160 Smart card reader or dummy smart card reader 89 1170 System board 91 1180 Power card cable and power card 95 1190 LCD unit 96 1200 Keyboard assembly for ThinkPad T490s or Keyboard bezel assembly for ThinkPad X390 98 2010 LCD bezel cover and LCD bezel 98 2020 LCD hinges 99 2030 LCD panel and LCD ...

Page 5: ...iagnostic tests to troubleshoot problems Important This manual is intended only for trained service technicians who are familiar with ThinkPad products Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively Before servicing a ThinkPad product be sure to read all the information under Chapter 1 Safety information on page 1 and Chapter 2 Important service infor...

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Page 7: ...hnicians and the customer s personnel are not in a hazardous position Place removed covers and other parts in a safe place away from all personnel while you are servicing the machine Keep your tool case away from walk areas so that other people will not trip over it Do not wear loose clothing that can be trapped in the moving parts of a machine Ensure that your sleeves are fastened or rolled up ab...

Page 8: ...lectrical shock can occur only when there is a complete circuit By observing the above rule you may prevent a current from passing through your body When using testers set the controls correctly and use the approved probe leads and accessories for that tester Stand on suitable rubber mats obtained locally if necessary to insulate you from grounds such as metal floor strips and machine frames Obser...

Page 9: ...puter Disconnect the power cord 3 Check the power cord for a A third wire ground connector in good condition Use a meter to measure third wire ground continuity for 0 1 ohm or less between the external ground pin and the frame ground b The power cord should be the authorized type specified for your computer Go to https support lenovo com partslookup c Insulation must not be frayed or worn 4 Check ...

Page 10: ...quirement Note The use of a grounding system to guard against ESD damage is desirable but not necessary Attach the ESD ground clip to any frame ground ground braid or green wire ground When working on a double insulated or battery operated system use an ESD common ground or reference point You can use coax or connector outside shells on these systems Use the round ground prong of the ac plug on ac...

Page 11: ...DANGER DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information 5 ...

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Page 13: ...PERIGO Chapter 1 Safety information 7 ...

Page 14: ...PERIGO PERIGO PERIGO PERIGO 8 T490s and X390 Hardware Maintenance Manual ...

Page 15: ...PERIGO PERIGO PERIGO DANGER DANGER Chapter 1 Safety information 9 ...

Page 16: ...DANGER DANGER DANGER DANGER DANGER 10 T490s and X390 Hardware Maintenance Manual ...

Page 17: ...DANGER VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information 11 ...

Page 18: ...VORSICHT VORSICHT VORSICHT VORSICHT 12 T490s and X390 Hardware Maintenance Manual ...

Page 19: ...Chapter 1 Safety information 13 ...

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Page 21: ...Chapter 1 Safety information 15 ...

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Page 23: ...Chapter 1 Safety information 17 ...

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Page 25: ...Chapter 1 Safety information 19 ...

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Page 27: ...replacing any FRUs listed in this manual After a system board is replaced ensure that the latest UEFI BIOS is loaded to the system board before completing the service action To download software fixes drivers and UEFI BIOS go to https support lenovo com and follow the instructions on the screen Use the following strategy to prevent unnecessary expense for replacing and servicing FRUs If you are in...

Page 28: ...el types and how to identify each type Dynamic Configure To Order CTO model This model provides the ability for a customer to configure a Lenovo solution from a Web Site and have this configuration sent to fulfillment where it is built and shipped directly to the customer The machine label and eSupport will load these products as the 4 character MT 4 character model and 2 character country code Th...

Page 29: ...2 Type the Machine Type in the corresponding field to get a general FRU list Or type the Serial Number for more detailed FRU information Chapter 2 Important service information 23 ...

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Page 31: ...ing to do with a hardware defect such as cosmic radiation ESD or software errors Consider replacing a FRU only when a problem recurs If you suspect that a FRU is defective clear the error log and run the test again If the error does not recur do not replace the FRU Be careful not to replace a nondefective FRU What to do first When you return a FRU you must include the following information in the ...

Page 32: ...ThinkPad products The use of non ThinkPad products prototype cards or modified options can lead to false indications of errors and invalid system responses 1 Identify the failing symptoms in as much detail as possible 2 Verify the symptoms Try to re create the failure by running the diagnostic test or by repeating the operation Diagnosing problems Many computer problems can be solved without outsi...

Page 33: ...mputer If the computer cannot be turned on go to Power system checkout on page 28 and check the power sources If an error code is displayed go to Symptom to FRU index on page 36 for error code descriptions and troubleshooting hints 2 When the logo screen is displayed repeatedly press and release the F10 key The main screen of the UEFI diagnostic program is displayed 3 Follow the instructions on th...

Page 34: ... turned on go to Power system checkout on page 28 and check the power sources If an error code is displayed go to Symptom to FRU index on page 36 for error code descriptions and troubleshooting hints 2 Insert the disc into the optical drive 3 Restart the computer 4 When the logo screen is displayed repeatedly press and release the F12 key When the Boot Menu window opens release the F12 key 5 Use t...

Page 35: ...em does not support unauthorized batteries or batteries designed for other systems If an unauthorized battery or a battery designed for another systems is installed the system will not charge Attention Lenovo has no responsibility for the performance or safety of unauthorized batteries and provides no warranties for failures or damage arising out of their use Move your pointer to the battery statu...

Page 36: ...d If the voltage is correct replace the system board If the voltage is not correct replace the coin cell battery If the coin cell battery discharges quickly after replacement replace the system board 30 T490s and X390 Hardware Maintenance Manual ...

Page 37: ... the resetting process you can choose to keep your files or remove them and then reinstall the Windows operating system To reset your computer do the following Note The graphical user interface GUI items of the operating system might change without notice 1 Open the Start menu and then click Settings Update Security Recovery 2 In the Reset this PC section click Get started 3 Follow the instruction...

Page 38: ...n the USB drive To avoid data loss make a backup copy of all the data that you want to keep To create a recovery USB drive do the following Note Ensure that your computer is connected to ac power during the following process 1 Connect a proper USB drive at least 16 GB of storage 2 Type recovery in the search box on the taskbar Then click Create a recovery drive 3 Click Yes in the User Account Cont...

Page 39: ...n forgotten check whether a master hard disk password has been set If a master hard disk password has been set it can be used to access the solid state drive If no master hard disk password is available neither Lenovo nor Lenovo authorized service technicians provide any services to reset either the user hard disk password or the master hard disk password or to recover data from the solid state dr...

Page 40: ... Press F10 to save changes and exit How to remove the hard disk password Attention If User only mode is selected and the user hard disk password has been forgotten and cannot be made available to the service technician neither Lenovo nor Lenovo authorized service technicians provide any services to reset the user hard disk password or to recover data from the solid state drive The solid state driv...

Page 41: ...s not accept any input immediately after it enters sleep mode Wait a few seconds before taking any action to reenter operation mode Hibernation mode In hibernation mode the following occurs The system status RAM VRAM and setup data are stored on the solid state drive The system is powered off Note If the computer enters the hibernation mode while it is connected to the dock do not disconnect it be...

Page 42: ...ve descriptions of symptoms If the symptom is not described there go to Intermittent problems on page 41 Note For a device not supported by diagnostic codes in the ThinkPad notebook computers see the manual for that device Numeric error codes Table 2 Numeric error codes Symptom or error FRU or action in sequence 0177 Bad SVP data stop POST task The checksum of the supervisor password in the EEPROM...

Page 43: ...ngerprint reader is attached Power off and remove all but the reader that you set up within your main operating system Remove all but the reader that you set up for the authentication 2100 Detection error on Main HDD SSD0 or Detection error on Main HDD HDD0 1 Reseat the M 2 solid state drive 2 Replace the M 2 solid state drive 3 Replace the system board 2110 Read error on Main HDD SSD0 or Read err...

Page 44: ...technology enables you to decode beep errors with your smartphone when a black screen occurs with beeps from your computer To decode the beep error with Lenovo SmartBeep technology do the following 1 Go to https support lenovo com smartbeep or scan the following QR Code 2 Download the proper diagnostic app and install it on your smartphone 3 Run the diagnostic app and place the smartphone near the...

Page 45: ... 2 Replace the system board service provider only 0284 TCG compliant functionality related error might be the BIOS code validation failure Replace the system board service provider only 0285 TCG compliant functionality related error might be the TPM initialization failure Replace the system board service provider only 0286 Integrated graphics error Replace the system board service provider only 02...

Page 46: ... B sub pixels LCD Self Test When you turn on the computer and the LCD goes black run LCD Self Test to help you determine whether the LCD functions normally To run LCD Self Test 1 Ensure that the computer is connected to ac power Then press the power button for about seven seconds to turn off the computer 2 Press Fn left Ctrl and the power button at the same time If the computer displays five solid...

Page 47: ... isolate the failing FRU do not isolate FRUs that have no defects Verify that all attached devices are supported by the computer Verify that the power supply being used at the time of the failure is operating correctly See Power system checkout on page 28 1 Turn off the computer 2 Visually check each FRU for damage Replace any damaged FRU 3 Remove or disconnect all of the following devices a Non T...

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Page 49: ...upper case and lower case When the key indicator is on you can type uppercase letters 3 F1 F12 function keys Invoke the special function printed as an icon on each key or standard function To choose whether to invoke the special function or standard function 1 Go to Control Panel and view by Large icons or Small icons 2 Click Keyboard or Lenovo Keyboard Manager and select the option of your prefer...

Page 50: ...phones are muted Darken the computer display Brighten the computer display Manage external displays Enable or disable the built in wireless features Open the Settings window Enable or disable the built in Bluetooth features Open a keyboard setting page Invoke the function defined by yourself 1 Open the Start menu and click Lenovo Vantage 2 Click Hardware Settings and then click Input 3 Locate the ...

Page 51: ...ause key on a conventional external keyboard Fn S Equal the SysRq key on a conventional external keyboard Fn 4 Put the computer to sleep mode To wake up the computer press Fn or the power button Fn Left arrow key Equal the Home key Fn Right arrow key Equal the End key Chapter 5 Special keys 45 ...

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Page 53: ...Chapter 6 Locations Locating computer controls connectors and indicators Front 1 Infrared camera 4 Camera 2 ThinkShutter 5 Multi touch screen 3 Microphones for selected models Copyright Lenovo 2019 47 ...

Page 54: ...Base ThinkPad T490s ThinkPad X390 1 Power button 4 NFC mark 2 Fingerprint reader 5 TrackPoint pointing device 3 Trackpad for selected models 48 T490s and X390 Hardware Maintenance Manual ...

Page 55: ...en 1 2 Thunderbolt 3 connector USB C 6 HDMI connector 3 Ethernet extension connector Gen 2 7 Audio connector 4 Docking station connector Right 1 Smart card slot 3 Security lock slot 2 Always On USB 3 1 connector Gen 1 for selected models Chapter 6 Locations 49 ...

Page 56: ...Rear 1 System status indicator 2 Nano SIM card and microSD card slot 50 T490s and X390 Hardware Maintenance Manual ...

Page 57: ...oles 3 Speakers 2 Emergency reset hole Locating FRUs and CRUs This topic introduces the following service parts Major FRUs and CRUs on page 52 LCD FRUs and CRUs on page 58 Miscellaneous parts on page 60 Connector and cable guide on page 60 Chapter 6 Locations 51 ...

Page 58: ...ontainer will be included with the replacement CRU and 2 you might be charged for the replacement CRU if Lenovo does not receive the defective CRU within thirty 30 days of your receipt of the replacement CRU See your Lenovo Limited Warranty documentation for full details ThinkPad computers contain the following types of CRUs and FRUs Self service CRUs Refer to parts that can be installed or replac...

Page 59: ...ThinkPad T490s a b c d Chapter 6 Locations 53 ...

Page 60: ...le No No 16 Fingerprint reader bracket No No 17 Fingerprint reader No No 18 Base cover assembly Yes No 19 Trackpad cable for non NFC models No No 20 Trackpad cable for NFC models No No 21 NFC card No No 22 Built in battery No No 23 Speaker assembly No No 24 M 2 2242 solid state drive bracket Yes No 25 M 2 2242 solid state drive Yes No 26 Thermal pad for M 2 2242 solid state drive No No 27 System b...

Page 61: ...RUs and CRUs continued No FRU description Self service CRU Optional service CRU c ac power adapter Yes No d Miscellaneous parts kits see Miscellaneous parts on page 60 No No for selected models Chapter 6 Locations 55 ...

Page 62: ...ThinkPad X390 a b c d 56 T490s and X390 Hardware Maintenance Manual ...

Page 63: ...Base cover assembly Yes No 16 Fingerprint reader bracket No No 17 Fingerprint reader No No 18 Trackpad cable for non NFC models No No 19 Trackpad cable for NFC models No No 20 NFC card No No 21 Built in battery No No 22 M 2 2280 solid state drive Yes No 23 Thermal pad for M 2 2280 solid state drive No No 24 Speaker assembly No No 25 System board No No 26 M 2 2242 solid state drive bracket Yes No 2...

Page 64: ...ed No FRU description Self service CRU Optional service CRU c ac power adapter Yes No d Miscellaneous parts kits see Miscellaneous parts on page 60 No No for selected models LCD FRUs and CRUs 58 T490s and X390 Hardware Maintenance Manual ...

Page 65: ... foil for ThinkPad T490s only No No 6 LCD panel No No 7 Antenna kit No No 8 LCD hinges No No 9 Camera and microphone module cable No No 10 LCD cover assembly No No Depending on the computer model the cable might look different from the illustration above For more information about the cable types see 2050 Camera and microphone module cable and antenna kit on page 101 Chapter 6 Locations 59 ...

Page 66: ... 2 5 black 4 M2 x L2 2 black 10 Spec No No Mechanical miscellaneous kit Microphone rubber WWAN card mylar Smart card reader mylar Spec No No Label kit Label Spec No No Connector and cable guide This topic provides information to help Lenovo authorized service technicians identify connectors and cables for replacement purpose To view each FRU and the exploded illustration of the computer see Major ...

Page 67: ...rophone module and the other end to this connector 3 Thermal fan connector internal Thermal fan cable The thermal fan comes with the cable Connect the cable to this connector 4 Wireless WAN card slot internal No Insert a wireless WAN card into this slot 5 LCD connector internal LCD cable Connect one end to the LCD panel and the other end to this connector 6 Solid state drive slot internal No Inser...

Page 68: ...his connector 13 Coin cell battery connector internal Coin cell battery cable The coin cell battery comes with cable Connect the cable to this connector 14 Speaker connector internal Speaker cable The speaker comes with the cable Connect the cable to this connector 15 16 Keyboard connectors for ThinkPad T490s internal Keyboard assembly cables The keyboard assembly comes with the cables Connect the...

Page 69: ...erprint reader cable connect one end of the cable to the smart card reader one end to the fingerprint reader and the other end to this connector 20 Always On USB 3 1 connector Gen 1 external No Connect a USB A compatible device to this connector 21 Nano SIM card and microSD card slot external No Insert a microSD card or Nano Subscriber Identity Module SIM card into this slot 22 23 Keyboard connect...

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Page 71: ...to https support lenovo com partslookup It is recommended to use new screws It is recommended to use each screw only once Tighten screws as follows Plastic to plastic Turn an additional angle of 90 degrees after the screw head touches the surface of the plastic part Logic card to plastic Turn an additional angle of 180 degrees after the screw head touches the surface of the logic card Notes Ensure...

Page 72: ...en the logo is displayed press Esc The ThinkPad Config Information Update Utility interface is displayed 5 Type 1 under Enter the action desired then press Enter The ThinkPad Serial Number Update Utility for Asset ID screen is displayed 6 Type 2 under Enter the action desired then press Enter The serial number of each device in your computer is displayed the serial number of the system unit is lis...

Page 73: ... ECA Information Read Write function on the LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance Key 1 Insert the latest version of LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance Key and then restart the computer 2 From the main menu select 6 Set ECA Information 3 To read the ECA information select 2 Read ECA rework number from EEPROM and follow the instructions on the screen...

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Page 75: ...e the correct screws as shown in the replacement procedures DANGER Before removing any FRU turn off the computer unplug all power cords from electrical outlets disable the built in battery and then disconnect any interconnecting cables Attention After replacing a FRU do not turn on the computer until you have made sure that all screws springs and other small parts are in place and none are loose i...

Page 76: ...and the computer turns off automatically Wait three to five minutes to let the computer cool Removing the nano SIM card and microSD card tray Note If the computer you are servicing has a nano SIM card or microSD card installed remove the card with the tray together 1010 Keyboard for ThinkPad X390 only Removal steps Note If the keyboard must be removed to access other FRUs you need the keyboard rem...

Page 77: ...c d Chapter 8 Removing or replacing a FRU 71 ...

Page 78: ...When installing Ensure that the connectors are attached firmly 1020 Base cover assembly Removal steps 72 T490s and X390 Hardware Maintenance Manual ...

Page 79: ...replace the base cover assembly For the labels that are not shipped with the new base cover assembly peel them from the old base cover assembly and adhere them to the new one ThinkPad T490s ThinkPad X390 1 GEO and system label 2 Genuine Microsoft label Windows 10 3 COA label 4 IMEI label 5 S N label 6 Asset tag 7 Country label 8 CMIIT label 1030 M 2 solid state drive bracket and thermal pad For ac...

Page 80: ...ysical shocks For computer models that support the Intel Optane technology disable the Intel Optane memory before removing it To disable the Intel Optane memory do the following 1 Restart the computer When the logo screen is displayed press F1 Note If a supervisor password has been set enter the correct password when prompted You also can press Enter to skip the password prompt and enter the BIOS ...

Page 81: ... 1 85 kgf cm Removal steps of the short M 2 solid state drive Step Screw quantity Color Torque 1 M2 2 2 mm flat head nylon coated 2 Black 0 181 Nm 1 85 kgf cm 1040 Wireless WAN card For access remove this FRU 1020 Base cover assembly on page 72 Chapter 8 Removing or replacing a FRU 75 ...

Page 82: ...ble into the main connector and the blue cable into the auxiliary connector on the card 1050 Docking station connector bracket For access remove this FRU 1020 Base cover assembly on page 72 Removal steps Step Screw quantity Color Torque 1 M2 4 5 mm flat head nylon coated 1 Black 0 181 Nm 1 85 kgf cm 76 T490s and X390 Hardware Maintenance Manual ...

Page 83: ... cover and the fan hub Before you attach the fan assembly to the computer apply thermal grease at an amount of 0 2 grams on the part marked a as shown in the following illustrations Either too much or too less application of grease can cause a thermal problem due to imperfect contact with a component 1070 USB card cable and USB card For access remove these FRUs 1020 Base cover assembly on page 72 ...

Page 84: ...oval steps of the USB card cable Removal steps of the USB card Step Screw quantity Color Torque 3 M2 3 mm flat head nylon coated 2 Silver 0 181 Nm 1 85 kgf cm 78 T490s and X390 Hardware Maintenance Manual ...

Page 85: ... battery diagnostic test that determines if the battery is defective A battery FRU should not be replaced unless this diagnostic test shows that the battery is defective The only exception to this is if the battery is physically damaged or a customer is reporting a possible safety issue Note that a physically damaged battery is a non warranty replacement part For access remove this FRU 1020 Base c...

Page 86: ...m flat head nylon coated 4 Black 0 181 Nm 1 85 kgf cm When installing Ensure that the connector is attached firmly Ensure that the base cover assembly is secured in place Otherwise the battery connection may fail 80 T490s and X390 Hardware Maintenance Manual ...

Page 87: ...ss remove these FRUs in order 1020 Base cover assembly on page 72 1080 Built in battery on page 79 Removal steps When installing Ensure that the connector is attached firmly 1100 Trackpad cable For access remove these FRUs in order 1020 Base cover assembly on page 72 1080 Built in battery on page 79 Chapter 8 Removing or replacing a FRU 81 ...

Page 88: ...f trackpad cable for non NFC model When installing Ensure that the connectors are attached firmly 1110 Trackpad For access remove these FRUs in order 1020 Base cover assembly on page 72 1080 Built in battery on page 79 82 T490s and X390 Hardware Maintenance Manual ...

Page 89: ...490s Step Screw quantity Color Torque 7 M2 2 mm flat head nylon coated 4 Black 0 181 Nm 1 85 kgf cm Table 12 Screw specification ThinkPad X390 Step Screw quantity Color Torque 7 M2 1 8 mm flat head nylon coated 4 Silver 0 181 Nm 1 85 kgf cm Chapter 8 Removing or replacing a FRU 83 ...

Page 90: ...kgf cm Table 14 Screw specification ThinkPad X390 Step Screw quantity Color Torque 4 M2 1 8 mm flat head nylon coated 4 Silver 0 181 Nm 1 85 kgf cm When installing Ensure that the connectors are attached firmly 1120 NFC card For access remove these FRUs in order 1020 Base cover assembly on page 72 1080 Built in battery on page 79 84 T490s and X390 Hardware Maintenance Manual ...

Page 91: ...se FRUs in order 1020 Base cover assembly on page 72 1080 Built in battery on page 79 Removal steps ThinkPad T490s Step Screw quantity Color Torque 2 M2 x 2 2 2 4 mm flat head nylon coated 4 Black 0 181 Nm 1 85 kgf cm Chapter 8 Removing or replacing a FRU 85 ...

Page 92: ...90 Step Screw quantity Color Torque 2 M2 x 2 2 2 5 mm flat head nylon coated 4 Black 0 181 Nm 1 85 kgf cm When installing Ensure that the connector is attached firmly 86 T490s and X390 Hardware Maintenance Manual ...

Page 93: ...e for ThinkPad T490s only For access remove these FRUs in order 1020 Base cover assembly on page 72 1080 Built in battery on page 79 ThinkPad T490s Removal steps of the fingerprint reader and smart card reader cable Removal steps of the fingerprint reader cable Removal steps of the smart card reader cable Chapter 8 Removing or replacing a FRU 87 ...

Page 94: ...els without fingerprint reader skip step 3 and 4 Removal steps of the fingerprint reader cable When installing Ensure that the connectors are attached firmly 1150 Fingerprint reader bracket and fingerprint reader For access remove these FRUs in order 88 T490s and X390 Hardware Maintenance Manual ...

Page 95: ... 1160 Smart card reader or dummy smart card reader For access remove these FRUs in order 1020 Base cover assembly on page 72 1080 Built in battery on page 79 1130 Speaker assembly on page 85 1140 Fingerprint reader and smart card reader cable fingerprint reader cable and smart card reader cable for ThinkPad T490s only on page 87 ThinkPad T490s Removal steps of the smart card reader Step Screw quan...

Page 96: ...flat head nylon coated 2 Black 0 181 Nm 1 85 kgf cm ThinkPad X390 Removal steps of the smart card reader Step Screw quantity Color Torque 1 M2 2 2 mm flat head nylon coated 3 Black 0 181 Nm 1 85 kgf cm Removal steps of the dummy smart card reader 90 T490s and X390 Hardware Maintenance Manual ...

Page 97: ... a hard surface such as metal wood or composite Avoid rough handling of any kind At every point in the process be sure not to drop or stack the system board If you put a system board down be sure to put it only on a padded surface such as an ESD mat or a corrugated conductive surface ThinkPad T490s and ThinkPad X390 share a common system board After replacing the system board you will be prompted ...

Page 98: ... 1060 Thermal fan assembly on page 77 1080 Built in battery on page 79 1010 Keyboard for ThinkPad X390 only on page 70 1020 Base cover assembly on page 72 1030 M 2 solid state drive bracket and thermal pad on page 73 1040 Wireless WAN card on page 75 1050 Docking station connector bracket on page 76 1060 Thermal fan assembly on page 77 Removal steps ThinkPad T490s 92 T490s and X390 Hardware Mainte...

Page 99: ...3 mm flat head nylon coated 4 Silver 0 181 Nm 1 85 kgf cm 21 M2 2 2 mm flat head nylon coated 2 Black 0 181 Nm 1 85 kgf cm When installing Ensure that the connectors are attached firmly ThinkPad X390 Chapter 8 Removing or replacing a FRU 93 ...

Page 100: ...n coated 2 Black 0 181 Nm 1 85 kgf cm When installing Ensure that the connectors are attached firmly Attention The Central Processing Unit CPU a soldered on the top side of the system board is extremely sensitive When you service the system board avoid any kind of rough handling 94 T490s and X390 Hardware Maintenance Manual ...

Page 101: ... page 73 1040 Wireless WAN card on page 75 1050 Docking station connector bracket on page 76 1060 Thermal fan assembly on page 77 1080 Built in battery on page 79 1170 System board on page 91 1010 Keyboard for ThinkPad X390 only on page 70 1020 Base cover assembly on page 72 1030 M 2 solid state drive bracket and thermal pad on page 73 1040 Wireless WAN card on page 75 1050 Docking station connect...

Page 102: ...e that the connector is attached firmly 1190 LCD unit For access remove this FRU 1020 Base cover assembly on page 72 Removal steps Table 15 Screw specification ThinkPad T490s Step Screw quantity Color Torque 1 M 2 5 5 mm flat head nylon coated 6 Silver 0 294 Nm 3 0 kgf cm 96 T490s and X390 Hardware Maintenance Manual ...

Page 103: ...oated 6 Silver 0 294 Nm 3 0 kgf cm When installing Ensure that the connectors are attached firmly Attention When you route the cables ensure that they are not subject to any tension Tension could cause the cables to be damaged by the cable guides or a wire to be broken Chapter 8 Removing or replacing a FRU 97 ...

Page 104: ...wer card on page 95 1190 LCD unit on page 96 For access remove these FRUs in order 1010 Keyboard for ThinkPad X390 only on page 70 1020 Base cover assembly on page 72 1030 M 2 solid state drive bracket and thermal pad on page 73 1040 Wireless WAN card on page 75 1050 Docking station connector bracket on page 76 1060 Thermal fan assembly on page 77 1070 USB card cable and USB card on page 77 1080 B...

Page 105: ...RUs in order 1020 Base cover assembly on page 72 1190 LCD unit on page 96 2010 LCD bezel cover and LCD bezel on page 98 Removal steps Table 17 Screw specification for ThinkPad T490s Step Screw quantity Color Torque 1 M2 5 2 3 mm flat head nylon coated 4 Black 0 294 Nm 3 0 kgf cm Chapter 8 Removing or replacing a FRU 99 ...

Page 106: ...s Attention If the LCD panel is fixed to the LCD cover assembly by tapes remove the LCD panel carefully Inappropriate handling might cause damage to the LCD panel When installing Ensure that the connector is attached firmly 2040 Camera and microphone module and aluminum foil for ThinkPad T490s only For access remove these FRUs in order 1020 Base cover assembly on page 72 1190 LCD unit on page 96 2...

Page 107: ...enna kit on page 101 Removal steps of the camera and microphone module and aluminum foil for ThinkPad T490s only Removal steps of the camera and microphone module 2050 Camera and microphone module cable and antenna kit For access remove these FRUs in order 1020 Base cover assembly on page 72 1190 LCD unit on page 96 2010 LCD bezel cover and LCD bezel on page 98 2020 LCD hinges on page 99 Chapter 8...

Page 108: ... 2030 LCD panel and LCD cable on page 100 102 T490s and X390 Hardware Maintenance Manual ...

Page 109: ...tem status indicator For models with conventional camera microphone and system status indicator For models with system status indicator only For models with IR camera microphone and system status indicator For models with conventional camera microphone and system status indicator For models with microphone and system status indicator For models with system status indicator only Chapter 8 Removing ...

Page 110: ...ht be different from the following illustration For models without camera skip the disconnection steps of the cable Removal steps of the antenna kit Attention When you route the cables ensure that they are not subject to any tension Tension could cause the cables to be damaged by the cable guides or a wire to be broken 104 T490s and X390 Hardware Maintenance Manual ...

Page 111: ...assembly For access remove these FRUs in order 1020 Base cover assembly on page 72 1190 LCD unit on page 96 2010 LCD bezel cover and LCD bezel on page 98 2020 LCD hinges on page 99 2030 LCD panel and LCD cable on page 100 2040 Camera and microphone module and aluminum foil for ThinkPad T490s only on page 100 2050 Camera and microphone module cable and antenna kit on page 101 Chapter 8 Removing or ...

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Page 113: ...e publication Lenovo may make improvements and or changes in the product s and or the program s described in this publication at any time without notice The products described in this document are not intended for use in implantation or other life support applications where malfunction may result in injury or death to persons The information contained in this document does not affect or change Len...

Page 114: ...tel Optane and Thunderbolt are trademarks of Intel Corporation or its subsidiaries in the U S and or other countries Microsoft and Windows are trademarks of the Microsoft group of companies The terms HDMI and HDMI High Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC in the United States and other countries USB C is a trademark of USB Implementers Forum...

Page 115: ...ceable Unit CTO Configure To Order EAIA Enhanced Asset Information Area EEPROM Electrically Erasable Programmable Read Only Memory EFI Extensible Firmware Interface ESD Electrostatic discharge FRU Field Replaceable Unit GAV General Announce Variant IC Integrated circuits LCD Liquid Crystal Display MTM Machine type and model POST Power on self test RFID Radio frequency identification SVP Supervisor...

Page 116: ...110 T490s and X390 Hardware Maintenance Manual ...

Page 117: ......

Page 118: ...Part Number SP40T09974 Printed in China 1P P N SP40T09974 1PSP40T09974 ...

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