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Chapter 6. Symptom-to-FRU Index

The Symptom-to-FRU index lists error symptoms and possible causes. The most 
likely cause is listed first. Always begin with Chapter 4, “General Checkout,” on 
page 11. This index can also be used to help you decide which FRUs to have 
available when servicing a computer. If you are unable to correct the problem 
using this index, go to “Undetermined problems” on page 20.

Notes: 

•  If you have both an error message and an incorrect audio response, diagnose 

the error message first.

•  If you cannot run the diagnostic tests or you get a diagnostic error code when 

running a test but did receive a POST error message, diagnose the POST error 
message first.

•  If you did not receive any error message look for a description of your error 

symptoms in the first part of this index.

Hard disk drive boot error

A hard disk drive boot error can have the following causes.

Error

FRU/Action

The startup drive is not included in the boot 
sequence in configuration.

Check the configuration and ensure the 
startup drive is in the boot sequence.

No operating system installed on the boot 
drive.

Install an operating system on the boot 
drive.

The boot sector on the startup drive is 
corrupted.

The drive must be formatted. Do the 
following: 

1. Attempt to back-up the data on the 

failing hard disk drive.

2. Use the operating system to format the 

hard disk drive.

The drive is defective.

Replace the hard disk drive.

Power Supply Problems

Follow these procedures if you suspect there is a power supply problem.

© Copyright Lenovo 2017

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Страница 1: ...Lenovo Legion Y720T Hardware Maintenance Manual Machine Types 90H9 Lenovo Legion Y720T 34ASU Energy Star ...

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Страница 3: ...Lenovo Legion Y720T Hardware Maintenance Manual Machine Types 90H9 Lenovo Legion Y720T 34ASU Energy Star ...

Страница 4: ...ht Lenovo 2017 LIMITED AND RESTRICTED RIGHTS NOTICE If data or software are delivered pursuant a General Services Administration GSA contract use reproduction or disclosure is subject to restrictions set forth in Contract No GS 35F 05925 ...

Страница 5: ... Setup Utility program 15 Viewing and changing settings 15 Using passwords 15 Enabling or disabling a device 18 Selecting a startup device 19 Exiting the Lenovo BIOS Setup Utility program 20 Chapter 6 Symptom to FRU Index 23 Hard disk drive boot error 23 Power Supply Problems 23 Additional Service Information 24 POST error codes 24 Undetermined problems 25 Chapter 7 Locations 27 Identifying intern...

Страница 6: ...drive 41 Replacing the microprocessor fan assembly 42 Replacing the rear system fan 43 Replacing a front fan 44 Replacing the Power supply 46 Replacing the Wi Fi card 47 Removing the top cover 48 Replacing a graphics card 50 Replacing the CPU 51 Replacing the motherboard 55 FRU lists 56 Chapter 9 General information 63 Additional Service Information 63 iv Lenovo Legion Y720T Hardware Maintenance M...

Страница 7: ...components ii cause the processor and other system components to fail iii cause reductions in system performance iv cause additional heat or other damage and v affect system data integrity Lenovo and Intel have not tested and do not warranty the operation of the processor beyond its specifications Lenovo and Intel have not tested and do not warranty the operation of other system components beyond ...

Страница 8: ...i delle istruzioni Certifique se de ler todas as instruções de cuidado e perigo neste manual antes de executar qualquer uma das instruções Es importante que lea todas las declaraciones de precaución y de peligro de este manual antes de seguir las instrucciones 2 Lenovo Legion Y720T Hardware Maintenance Manual ...

Страница 9: ...mer 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 above your elbows If you...

Страница 10: ... Do not use this type of mat to protect yourself from electrical shock Find the room emergency power off EPO switch disconnecting switch or electrical outlet If an electrical accident occurs you can then operate the switch or unplug the power cord quickly Do not work alone under hazardous conditions or near equipment that has hazardous voltages Disconnect all power before Performing a mechanical i...

Страница 11: ... worn or broken tools and testers Never assume that power has been disconnected from a circuit First check that it has been powered off Always look carefully for possible hazards in your work area Examples of these hazards are moist floors nongrounded power extension cables power surges and missing safety grounds Do not touch live electrical circuits with the reflective surface of a plastic dental...

Страница 12: ...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 frame ground b The power cord should be the appropriate type as specified in the parts listings c Insulation must not be frayed or worn 4 Remove the cover 5 Check for any obvious alterations Use good judgment a...

Страница 13: ...nsitive devices Select a grounding system such as those listed below to provide protection that meets the specific service requirement Note The use of a grounding system is desirable but not required to protect against ESD damage Attach the ESD ground clip to any frame ground ground braid or green wire ground Use an ESD common ground or reference point when working on a double insulated or battery...

Страница 14: ...rocedures Connect and disconnect cables as described in the following table when installing moving or opening covers on this product or attached devices To Connect To Disconnect 1 Turn everything OFF 2 First attach all cables to devices 3 Attach signal cables to connectors 4 Attach power cords to outlet 5 Turn device ON 1 Turn everything OFF 2 First remove power cords from outlet 3 Remove signal c...

Страница 15: ... no serviceable parts inside the device Use of controls or adjustments or performance of procedures other than those specified herein might result in hazardous radiation exposure DANGER Some laser products contain an embedded Class 3A or Class 3B laser diode Note the following Laser radiation when open Do not stare into the beam do not view directly with optical instruments and avoid direct exposu...

Страница 16: ...lied to the device The device also might have more than one power cord To remove all electrical current from the device ensure that all power cords are disconnected from the power source CAUTION Do not place any object weighing more than 82 kg 180 lbs on top of rack mounted devices 10 Lenovo Legion Y720T Hardware Maintenance Manual ...

Страница 17: ...ons for your computer This section lists the physical specifications for your computer Type Lenovo Legion Y720T This section lists the physical specifications Environment Air temperature Operating 10 to 35 C Transit 20 to 55 C Humidity Operating 35 to 80 Transit 20 to 90 40 C Altitude 86KPa to 106KPa Electrical input Input voltage 90V 264V AC Input frequency 47Hz 63Hz Copyright Lenovo 2017 11 ...

Страница 18: ...12 Lenovo Legion Y720T Hardware Maintenance Manual ...

Страница 19: ...dure to help determine the cause of the problem 1 Power off the computer and all external devices 2 Check all cables and power cords 3 Set all display controls to the middle position 4 Power on all external devices 5 Power on the computer Look for displayed error codes Look for readable instructions or a main menu on the display If you did not receive the correct response proceed to step 6 If you ...

Страница 20: ...14 Lenovo Legion Y720T Hardware Maintenance Manual ...

Страница 21: ... Setup Utility program menu is not displayed until you type your password For more information see Using passwords Viewing and changing settings System configuration options are listed in the Lenovo BIOS Setup Utility program menu To view or change settings see Starting the Setup Utility program You must use the keyboard when using the Lenovo BIOS Setup Utility menu The keys used to perform variou...

Страница 22: ...mpt is displayed every time you access the Lenovo BIOS Setup Utility program If both the Administrator and Power On Password are set you can type either password However you must use your Administrator Password to change any configuration settings Setting changing or deleting an Administrator password To set an Administrator Password do the following Note A password can be any combination of lette...

Страница 23: ...or each new password line item A setup notice will display that changes have been saved 4 Return to the Lenovo BIOS Setup Utility program menu and select the Exit option 5 Select Save changes and Exit from the menu Power On Password When a Power On Password is set you cannot start the Lenovo BIOS Setup Utility program until a valid password is typed from the keyboard Setting changing or deleting a...

Страница 24: ...sword dialog box will be displayed Type the current password and press the Enter key 3 To delete the Power On Password Enter blank fields for each new password line item A setup notice will display that changes have been saved 4 Return to the Lenovo BIOS Setup Utility program menu and select the Exit option 5 Select Save changes and Exit from the menu Enabling or disabling a device The Devices opt...

Страница 25: ...es 3 Select USB Setup press the Enter key and then select USB Functions ATA Device Setup press the Enter key Select Configure SATA as press the Enter key and then select SATA mode Audio Setup press the Enter key and then select Onboard Audio Controller Network Setup press the Enter key then select Onboard Ethernet Support or Boot Agent 4 Select Disabled or Enabled and press the Enter key 5 Return ...

Страница 26: ...ge 13 2 From the Lenovo BIOS Setup Utility program main menu select the Startup option 3 Press the Enter key and select the devices for the Primary Boot Sequence Read the information displayed on the right side of the screen 4 Use and arrows to select a device Use the or keys to move a device up or down Use the key to exclude the device from or include the device in the boot sequence 5 Return to t...

Страница 27: ...utton and then press the Enter key to exit the Lenovo BIOS Setup Utility program If you do not want to save the settings select Discard changes and Exit from the menu When the Reset Without Saving window shows select the Yes button and then press the Enter key to exit the Setup Utility program Chapter 5 Using the Setup Utility 21 ...

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Страница 29: ...age first If you did not receive any error message look for a description of your error symptoms in the first part of this index Hard disk drive boot error A hard disk drive boot error can have the following causes Error FRU Action The startup drive is not included in the boot sequence in configuration Check the configuration and ensure the startup drive is in the boot sequence No operating system...

Страница 30: ...ed to control the power management features of the computer and the settings for Advanced Power Management APM BIOS mode is ignored Not all operating systems support ACPI BIOS mode Automatic Power On features The Automatic Power On features within the Power Management menu allow you to enable and disable features that turn on the computer automatically Wake Up on Alarm You can specify a date and t...

Страница 31: ... device or Insert Boot Media in selected Boot device The BIOS was unable to find a suitable boot device Make sure the boot drive is properly connected to the computer Make sure you have bootable media in the boot device Undetermined problems 1 Power off the computer 2 Remove or disconnect the following components if connected or installed one at a time a External devices modem printer or mouse b E...

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Страница 33: ...ion provides illustrations to help locate the various connectors controls and components of the computer Identifying internal components The following illustration shows the components inside your computer Copyright Lenovo 2017 27 ...

Страница 34: ...5 6 7 9 17 15 16 14 13 10 12 11 10 19 20 21 22 23 24 25 26 27 8 18 No Description Self service CRU Optional service CRU 1 Chassis No No 2 System fan rear No No 28 Lenovo Legion Y720T Hardware Maintenance Manual ...

Страница 35: ...erry No No 12 Wi Fi card No No 13 Wi Fi bracket No No 14 Micro process heat sink fin No No 15 SSD Yes Yes 16 Memory module Yes Yes 17 Top cover No No 18 Wi Fi antenna No No 19 Front I O module No No 20 Optical drive holder No No 21 Front bezel Yes Yes 22 System fan front No Yes 23 Hard disk drive bracket Yes Yes 24 Hard disk drive Yes Yes 25 Mouse Yes Yes 26 Keyboard Yes Yes 27 Power cord Yes Yes ...

Страница 36: ...computer It provides basic computer functions and supports a variety of devices that are factory installed or that you can install later The following illustrations show the locations of the different parts on the system board Y720T 10 12 14 13 16 17 15 18 19 20 1 2 3 4 5 6 7 8 9 11 30 Lenovo Legion Y720T Hardware Maintenance Manual ...

Страница 37: ...ssor fan header 2 14 Front USB 2 0 connector Power fan header 5 Memory slots 4 15 Front USB card reader connector 6 Front LED header 16 LPC debug 7 Power connector 17 Mini PCI E slot 8 Front USB 3 0 slot 18 PCI express X 1 adapter slots 5 9 Aux fan 1 19 PCI express X 16 adapter slot 10 SATA connectors 4 20 System fan header Chapter 7 Locations 31 ...

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Страница 39: ...nstructions Before proceeding with the disassembly procedure make sure that you do the following 1 Turn off the power to the system and all peripherals 2 Unplug all power and signal cables from the computer 3 Place the system on a flat stable surface General information Pre disassembly instructions Before proceeding with the disassembly procedure make sure that you do the following 1 Turn off the ...

Страница 40: ...nd any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the computer cover Refer to Removing the computer cover Step 5 Press then pull the out the rear dust screen as shown Step 6 Cleaning tips a Us a brush gently brush through the dust screen to remove the dust b If cleaning the dust screen with ...

Страница 41: ...lat stable surface To remove the computer cover Step 1 Remove any media disks CDs or memory cards from the drives shut down the computer and turn off all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Locati...

Страница 42: ...the computer cover ii Step 1 Remove any media disks CDs or memory cards from the drives shut down the computer and turn off all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Locating connectors on the rear ...

Страница 43: ...ocked properly c Secure the computer cover with two screws Removing the front bezel Note For this procedure it helps to lay the computer flat To remove the front bezel Step 1 Remove the computer cover Refer to Removing the computer cover Step 2 Remove the front bezel by releasing the three plastic tabs inside the chassis and pulling the bezel out as shown Chapter 8 Replacing hardware 37 ...

Страница 44: ...er cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the computer cover Refer to Removing the computer cover Step 5 Remove the computer cover Refer to Removi...

Страница 45: ...e up the new dust screen with the chassis and push the screen into position Replacing a memory module Note For this procedure it helps to lay the computer flat To replace a memory module Step 1 Remove the computer cover Refer to Removing the computer cover Step 2 Locate the memory module connectors Refer to Locating components Step 3 Remove the memory module to be replaced by opening the retaining...

Страница 46: ...ining clips close Step 5 Reattach the computer cover Replacing a hard disk drive Note For this procedure it helps to lay the computer flat To replace a hard disk drive Step 1 Remove the computer cover Refer to Removing the computer cover Step 2 Disconnect the data and power cables from the hard disk drive a Step 3 Pull the plastic handle and slide the hard disk drive out of the drive bay b c 40 Le...

Страница 47: ...ep 7 Reattach the computer cover Replacing an optical drive Note For this procedure it helps to lay the computer flat stable surface To replace an optical drive Step 1 Remove the computer cover Refer to Removing the computer cover Step 2 Remove the front bezel Refer to Removing the front bezel Step 3 Disconnect the data and power cables from the rear of the optical drive a Step 4 Press the release...

Страница 48: ...d devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the computer cover Refer to Removing the computer cover Step 5 Disconnect...

Страница 49: ...eplace the system fan Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Le...

Страница 50: ...rews then pull the rear system fan assembly out of computer case Step 7 To install the new system fan a Line up the new system fan with the computer case and secure it to the computer case with locking screws by pulling the plastic screws through the locking hole b Connect the system fan power cable to the connector on the board Step 8 Reattach the computer cover Replacing a front fan To replace a...

Страница 51: ...e various connectors Step 4 Remove the computer cover Refer to Removing the computer cover Step 5 Remove the computer cover ii Refer to Removing the computer cover ii Step 6 Remove the front bezel Refer to Removing the front bezel Step 7 Disconnect the fan from the connector on the motherboard Step 8 The front fan and the bracket are mounted to the chassis with two pins Press down the two pins as ...

Страница 52: ... helps to lay the computer flat To replace the Power supply Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are...

Страница 53: ... the power cables to the connectors on the motherboard Step 9 Reattach the computer cover Replacing the Wi Fi card Note For this procedure it helps to lay the computer flat To replace the Wi Fi card Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical ou...

Страница 54: ...Fi card Step 9 Reattach the computer cover Removing the top cover Attention Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover For this procedure it helps to lay the computer on a flat stable surface To remove the top cover Step 1 Remove any media disks CDs or memory cards from the drives shut down the computer and turn off all attached devices Step 2 Unplu...

Страница 55: ...de down locate the top cover locking fin as shown Use a flat head screw drivers to pry up the locking fin to release the top cover Step 6 Slide the top cover outward to remove the top cover as shown Chapter 8 Replacing hardware 49 ...

Страница 56: ... in b Push the cover till it s locking position c Press down the locking fin to secure the top cover Step 8 Reattach the computer cover Replacing a graphics card Note For this procedure it helps to lay the computer on a flat stable surface To replace a graphics card 50 Lenovo Legion Y720T Hardware Maintenance Manual ...

Страница 57: ...ocking pin that locks the graphic card to the motherboard 4 then lift the card straight up to remove it 5 Step 6 To install the new graphics card a Attach the new graphics card to the same adapter connector b Connect the power cables to the new graphics card c Turn the graphics card latch to the closed position and secure it with the locking pin Step 7 Reattach the computer cover Replacing the CPU...

Страница 58: ...cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the computer cover Refer to Removing the computer cover Step 5 Remove the microprocessor fan Refer to Replacing the microprocessor fan Step 6 Remove the CPU fan assembly Refer to Replacing the CPU fan assembly Step 7 To remove the microprocessor 3 from th...

Страница 59: ...he sides Note Do not drop anything onto the microprocessor socket while it is exposed The socket pins must be kept as clean as possible Step 8 Holding the sides of the microprocessor with your fingers remove the protective cover 1 that protects the gold contacts on the new microprocessor 2 Chapter 8 Replacing hardware 53 ...

Страница 60: ...ocessor are aligned with the tabs in the microprocessor socket Important To avoid damaging the microprocessor contacts keep the microprocessor completely level while installing it into the socket Step 10 Lower the microprocessor straight down into its socket on the motherboard 54 Lenovo Legion Y720T Hardware Maintenance Manual ...

Страница 61: ...plug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the computer cover Refer to Removing the computer cover Step 5 Remove the memory module Refe...

Страница 62: ...ach the memory module Wi Fi card CPU and the heat sink to the new motherboard c Connect the all cables to the new motherboard d Attach the graphic card to the new motherboard Step 15 Reattach the computer cover FRU lists This chapter lists the information on the field replaceable units FRUs Attention Be sure to read and understand all the safety information before replacing any FRUs Lenovo Legion ...

Страница 63: ...BK HBW 00XH605 USB Calliope KB BK HUN 00XH607 USB Calliope KB BK ITA 00XH598 USB Calliope KB BK FRA 00XH622 USB Calliope KB BK THAI 00XH630 USB Calliope KB BK IND ENG 00XH618 USB Calliope KB BK SLK 00XH602 USB Calliope KB BK GRE 00XH625 USB Calliope KB BK UKE 00XH619 USB Calliope KB BK SPA 00XH601 USB Calliope KB BK GER 00XH624 USB Calliope KB BK TUR 00XH611 USB Calliope KB BK LA SPA 00XH993 USB C...

Страница 64: ... 1TB 7200 DT3 SATA3 STD 00PC552 HDD 2TB 7200 DT3 SATA3 STD 00PC551 HDD 1TB 7200 DT3 SATA3 STD HEATSINK 01MN125 AMD SuR 95W CPU Cooler LINECORD 00XL037 Fru LINECORD AR 1 8M 3P NON LH 00XL050 Fru LINECORD TH 1 8M 3P NON LH 00XL000 Fru JP Anti TR 1 8M 3P NON LH 00XL047 Fru LINECORD IT 1 8M 3P NON LH 00XL023 Fru LINECORD GB 1 8M 3P NON LH 00XL031 Fru LINECORD CH 1 8M 3P NON LH 00XL029 Fru LINECORD CH ...

Страница 65: ...L006 Fru US CA 1 8M 3P NON LH 00XL038 Fru LINECORD ZA 1 8M 3P NON LH 00XL001 Fru JP Anti TR 1 8M 3P NON LH 00XL044 Fru LINECORD DK 1 8M 3P NON LH 00XL039 Fru LINECORD ZA 1 8M 3P NON LH 00XL034 Fru LINECORD BR 1 8M 3P NON LH 00XL010 Fru LINECORD CN 1 8M 3P NON LH 00XL015 Fru EU KR 1 8M 3P NON LH 00XL048 Fru LINECORD IT 1 8M 3P NON LH 00XL020 Fru LINECORD IN 1 8M 3P NON LH 00XL004 Fru US CA 1 8M 3P ...

Страница 66: ...01MN143 34L FIO ASSY Y720AMD 00XD545 34L HDD Try Destiny 00XD539 34L Top Handle Destiny 00XD550 34L R cover Y700 MECHANICAL 00XD415 Y700 GTX980 970 GFX bracket MEMORY 01AG821 8GB DDR4 2666 UDIMM Ramaxel 01AG805 8GB DDR4 2400UDIMM 01AG815 8GB DDR4 2666 UDIMM MICRON MOUSE 00PH131 USB Calliope Mouse Black Orange wh OPT_DRIVE 71Y5545 SMD DT SATA H H x16 PWR_SUPPLY 54Y8930 PWR_SUPPLY 100 240Vac 450W SP...

Страница 67: ...6G M 2 2280 PCIe3x4 SAM OPAL 00UP641 256G M 2 2280 PCIe3x4 TOS OPAL VIDEO_CARD 01AJ836 AMD RX480 8G D5 H 3DP 01AJ876 MSI RX570 4G D5 3 DP HDMI HP WIRELESS 01AX713 Wireless CMB LTN NFA344A M2 01AX726 Wireless CMB LTN NFA344A FCC Chapter 8 Replacing hardware 61 ...

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Страница 69: ...IOS As this computer has an ACPI BIOS system the operating system is allowed to control the power management features of the computer and the settings for Advanced Power Management APM BIOS mode is ignored Not all operating systems support ACPI BIOS mode Automatic Power On features The Automatic Power On features within the Power Management menu allow you to enable and disable features that turn o...

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