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Chapter 4. Removing a FRU or CRU

Service tools

The following table lists tools for servicing Lenovo computers. Tools with a cross mark are needed for serving
the product models as described by this publication. Prepare them before you service the product.

Table 4. Service tools

Service tool and consumable

Model applicability

Screwdriver (Phillips head) (PH1/PH01)

Screwdriver (Torx head) (T5)

Screwdriver (Torx head) (T30)

Pry tool 1

Tweezers (conductive)

Tweezers (isolated)

Suction cup

Hexagonal socket

Silicone grease

Acetate tape

Polyamide tape

Mylar tape

Electrical tape

Double-sided tape

Conductive tape

Eraser

Heat gun

Brown brush

Notes:

• T30 screwdrivers are used to service the new Intel Xeon CPUs.

• Hexagonal sockets are used to remove antenna connectors.

• Silicone grease is applied to the CPU and heatsink surfaces to eliminate air gaps.

General guidelines

When removing or replacing a FRU, ensure that you observe the following general guidelines:

1. Do not try to service any computer unless you have been trained and certified. An untrained person runs

the risk of damaging parts.

2. Begin by removing any FRUs that have to be removed before replacing the failing FRU. Any such FRUs

are listed at the beginning of each FRU replacement procedure. Remove them in the order in which they
are listed.

Содержание Legion Y740S-15IMH

Страница 1: ...Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 2: ...First Edition April 2020 Copyright Lenovo 2020 ...

Страница 3: ...move the coin cell battery 31 Remove the battery pack 32 Remove the touch pad bracket 33 Remove the WLAN card 34 Remove the speakers 36 Remove the M 2 solid state drive 37 Remove the heat sink 38 Remove the fans 39 Remove the USB C bracket 41 Remove the I O board 42 Remove the system board 43 Remove the upper case graphite 45 Remove the fingerprint reader 46 Remove the power LED board 48 Remove th...

Страница 4: ...ii Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 5: ...ne type MT Lenovo Legion Y740S 15IRH 81QA Lenovo Legion Y740S 15IMH 81YX Important This manual is intended only for trained service technicians who are familiar with Lenovo products Before servicing a Lenovo product be sure to read all the information under Chapter 1 Safety information on page 1 Copyright Lenovo 2020 iii ...

Страница 6: ...iv Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 7: ...or scarf inside clothing or fasten it with a non conductive clip about 8 centimeters 3 inches from the end Do not wear jewelry chains metal frame eyeglasses or metal fasteners for your clothing Attention Metal objects are good electrical conductors Wear safety glasses when you are hammering drilling soldering cutting wire attaching springs using solvents or working in any other conditions that mig...

Страница 8: ... Always look carefully for possible hazards in your work area Examples of these hazards are wet floors non grounded power extension cables power surges and missing safety grounds Do not touch live electrical circuits with the reflective surface of a plastic dental mirror The surface is conductive such touching can cause personal injury and machine damage Do not service the following parts with the...

Страница 9: ...its ICs should be considered sensitive to electrostatic discharge ESD ESD damage can occur when there is a difference in charge between objects Protect against ESD damage by equalizing the charge so that the machine the part the work mat and the person handling the part are all at the same charge Notes 1 Use product specific ESD procedures when they exceed the requirements noted here 2 Make sure t...

Страница 10: ... can be verified by a certified electrician Safety notices multilingual translations The safety notices in this section are provided in the following languages English Arabic Brazilian Portuguese French German Hebrew Japanese Korean Spanish Traditional Chinese DANGER DANGER DANGER 4 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

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

Страница 12: ...6 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

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

Страница 14: ...PERIGO PERIGO PERIGO PERIGO PERIGO 8 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 15: ...DANGER DANGER DANGER DANGER Chapter 1 Safety information 9 ...

Страница 16: ...DANGER DANGER DANGER DANGER VORSICHT 10 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 17: ...VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information 11 ...

Страница 18: ...VORSICHT VORSICHT VORSICHT 12 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

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

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

Страница 22: ...16 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

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

Страница 24: ...18 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

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

Страница 26: ...20 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 27: ...hen you return a FRU you must include the following information in the parts exchange form or parts return form that you attach to it 1 Name and phone number of service technician 2 Date of service 3 Date on which the machine failed 4 Date of purchase 5 Failure symptoms error codes appearing on the display and beep symptoms 6 Procedure index and page number in which the failing FRU was detected 7 ...

Страница 28: ... on laptop products The following symptoms might indicate damage caused by non warranted activities Missing parts might be a symptom of unauthorized service or modification Check for obvious damage to a hard disk drive If the spindle of a hard disk drive becomes noisy the hard disk drive might have been dropped or subject to excessive force CRU list Table 1 Model Lenovo Legion Y740S 15IRH Lenovo L...

Страница 29: ...3 Idetifying FRU CRU Locate FRU and CRU The exploded illustrations help Lenovo service technicians identify FRU or CRU that they may need to replace when servicing a customer s computer Copyright Lenovo 2020 23 ...

Страница 30: ...1 2 3 4 12 13 14 15 16 17 18 19 11 10 9 5 6 7 8 20 Figure 1 System exploded view 24 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 31: ...touch pad 4 Power LED board 5 Fingerprint reader 6 Coin cell battery 7 I O board 8 M 2 solid state drive SSD 9 Heat sink 10 Fans 11 Battery pack 12 Speakers 13 Lower case 14 WLAN sponge 15 WLAN card 16 System board 17 USB C bracket 18 Touch pad bracket 19 Upper case graphite 20 Screw kit Chapter 3 Idetifying FRU CRU 25 ...

Страница 32: ...1 2 3 5 6 7 8 9 4 Figure 2 LCD exploded view 26 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 33: ... LCD FRU CRU categories No FRU CRU category 1 LCD bezel mylar 2 LCD panel 3 Removable tapes 4 LCD cover 5 Bezel cap 6 Microphone board 7 Microphone board 8 Hinge cap 9 LCD hinge Chapter 3 Idetifying FRU CRU 27 ...

Страница 34: ...28 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 35: ...trical tape Double sided tape Conductive tape Eraser Heat gun Brown brush Notes T30 screwdrivers are used to service the new Intel Xeon CPUs Hexagonal sockets are used to remove antenna connectors Silicone grease is applied to the CPU and heatsink surfaces to eliminate air gaps General guidelines When removing or replacing a FRU ensure that you observe the following general guidelines 1 Do not try...

Страница 36: ...ug all power cords from electrical outlets Attention After replacing a FRU do not turn on the computer until you have ensured that all screws springs and other small parts are in place and none are loose inside the computer Verify this by shaking the computer gently and listening for rattling sounds Metallic parts or metal flakes can cause electrical short circuits Attention The system board is se...

Страница 37: ...number of the following replacement part Lower case Remove the coin cell battery Make sure the following FRU or CRU have been removed Remove the lower case on page 30 Step 1 Disconnect the battery cable and the coin cell battery cable from the system board Then remove the coin cell battery Attention Use your fingernail to pull the connector to unplug it Do not pull the cable Chapter 4 Removing a F...

Страница 38: ...the following FRU or CRU have been removed Remove the lower case on page 30 Remove the coin cell battery on page 31 Step 1 Disconnect the battery pack cable from the system board Then remove six screws and remove the battery pack Attention Use your fingernail to pull the connector to unplug it Do not pull the cable 32 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 39: ...ment part Battery pack Remove the touch pad bracket Make sure the following FRU or CRU have been removed Remove the lower case on page 30 Step 1 Disconnect the battery pack cable from the system board Then remove one screw and remove the touch pad bracket Attention Use your fingernail to pull the connector to unplug the battery pack cable Do not pull the cable Chapter 4 Removing a FRU or CRU 33 ...

Страница 40: ...lacement part Touch pad bracket Remove the WLAN card Make sure the following FRU or CRU have been removed Remove the lower case on page 30 Step 1 Disconnect the battery pack cable from the system board Then remove the WLAN sponge Attention Use your fingernail to pull the connector to unplug the battery pack cable Do not pull the cable 34 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware...

Страница 41: ...d slide the WLAN card out of the slot Figure 9 Slide WLAN card out of the slot Callout number Screw specifications Number of screws 4 M2 x L3 1 Go to https support lenovo com partslookup to look up the Lenovo part number of the following replacement part WLAN card Chapter 4 Removing a FRU or CRU 35 ...

Страница 42: ...e right speaker cable from the system board and remove the right speaker Attention Use your fingernail to pull the connector to unplug the battery pack cable Do not pull the cable Figure 10 Remove right speaker Step 2 Disconnect the left speaker cable from the system board Then remove the left speaker 36 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 43: ...ate drive Make sure the following FRU or CRU have been removed Remove the lower case on page 30 Step 1 Disconnect the battery pack cable from the system board Then remove two screws and slide the M 2 solid state drive out of the slot Attention Use your fingernail to pull the connector to unplug the battery pack cable Do not pull the cable Chapter 4 Removing a FRU or CRU 37 ...

Страница 44: ...ws and remove the heat sink Attention Use your fingernail to pull the connector to unplug the battery pack cable Do not pull the cable 38 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual Notes For LCD panel with the factory color calibration feature do the following to install new color profiles 1 2 Go to https pcsupport lenovo com us en downloads DS543953 to downloa...

Страница 45: ...wing replacement part Heat sink Remove the fans Make sure the following FRU or CRU have been removed Remove the lower case on page 30 Step 1 Disconnect the battery pack cable from the system board Then remove six screws and disconnect the fan cables Attention Use your fingernail to pull the connector to unplug the battery pack cable Do not pull the cable Chapter 4 Removing a FRU or CRU 39 ...

Страница 46: ...umber of screws 2 M2 x L3 6 Step 2 Remove the fans Figure 15 Remove fans Go to https support lenovo com partslookup to look up the Lenovo part number of the following replacement part Fans 40 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 47: ...attery pack cable from the system board Then remove four screws Attention Use your fingernail to pull the connector to unplug the battery pack cable Do not pull the cable Figure 16 Remove four screws Callout number Screw specifications Number of screws 2 M1 6 x L4 5 4 Step 2 Remove the USB C bracket Chapter 4 Removing a FRU or CRU 41 ...

Страница 48: ...wing FRU or CRU have been removed Remove the lower case on page 30 Step 1 Disconnect the battery pack cable from the system board and remove the I O board mylar Then remove two screws and remove the I O board Attention Use your fingernail to pull the connector to unplug the battery pack cable Do not pull the cable 42 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 49: ...ve been removed Remove the lower case on page 30 Remove the battery pack on page 32 Remove the coin cell battery on page 31 Remove the WLAN card on page 34 Remove the M 2 solid state drive on page 37 Remove the heat sink on page 38 Remove the fans on page 39 Remove the USB C bracket on page 41 Remove the I O board on page 42 Step 1 Disconnect the EDP cable touch pad cable keyboard cable FFC and LV...

Страница 50: ...isconnect fingerprint and LED FFC cables connected to the system board Figure 20 Disconnect cables Step 3 Remove three screws Then remove the system board 44 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 51: ...ard Remove the upper case graphite Make sure the following FRU CRU have been removed Remove the lower case on page 30 Remove the battery pack on page 32 Remove the WLAN card on page 34 Remove the M 2 solid state drive on page 37 Remove the heat sink on page 38 Remove the fans on page 39 Remove the system board on page 43 Step 1 Remove the upper case graphite Lenovo Legion Y740S 15IRH Chapter 4 Rem...

Страница 52: ...ollowing replacement part Upper case graphite Remove the fingerprint reader Make sure the following FRU or CRU have been removed Remove the lower case on page 30 Remove the battery pack on page 32 Remove the WLAN card on page 34 Remove the M 2 solid state drive on page 37 Remove the heat sink on page 38 46 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 53: ...egion Y740S 15IRH Figure 24 Remove two screws and remove fingerprint reader Callout number Screw specifications Number of screws 1 M1 6 x L2 5 2 Lenovo Legion Y740S 15IMH Figure 25 Remove four screws and remove fingerprint reader Callout number Screw specifications Number of screws 1 M1 6 x L2 5 4 Chapter 4 Removing a FRU or CRU 47 ...

Страница 54: ... have been removed Step 1 For model 15IRH remove one screw then remove the power button board For model 15IMH remove the power button board Lenovo Legion Y740S 15IRH Figure 26 Remove one screw and remove power LED board Callout number Screw specifications Number of screws 1 M2 x L2 1 Lenovo Legion Y740S 15IMH 48 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 55: ...art Power button board Remove the strip cover Make sure the following FRU or CRU have been removed Remove the lower case on page 30 Remove the battery pack on page 32 Step 1 Remove two hinge screws and two strip cover screws Then turn over the computer Figure 28 Remove two hinge and two strip cover screws Chapter 4 Removing a FRU or CRU 49 ...

Страница 56: ...k up the Lenovo part number of the following replacement part Strip cover Remove the LCD cap Make sure the following FRU or CRU have been removed Remove the lower case on page 30 Remove the battery pack on page 32 Remove the strip cover on page 49 Step 1 Remove two screws Then remove the left and right LCD cap 50 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 57: ...to look up the Lenovo part number of the following replacement part LCD cap Remove the LCD module Make sure the following FRU CRU have been removed Remove the lower case on page 30 Remove the battery pack on page 32 Remove the strip cover on page 49 Remove the LCD cap on page 50 Step 1 Loosen two screws Chapter 4 Removing a FRU or CRU 51 ...

Страница 58: ...per case and remove the LCD module Figure 32 Remove the LCD module Go to https support lenovo com partslookup to look up the Lenovo part number of the following replacement part LCD module Remove the LCD bezel Make sure the following FRU CRU have been removed 52 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 59: ...is not reusable Figure 33 Remove the LCD bezel Go to https support lenovo com partslookup to look up the Lenovo part number of the following replacement part LCD bezel Remove the bezel cap Make sure the following FRU CRU have been removed Remove the lower case on page 30 Remove the LCD bezel on page 52 Step 1 Remove two screws Then remove the bezel cap Chapter 4 Removing a FRU or CRU 53 ...

Страница 60: ...he Lenovo part number of the following replacement part Bezel cap Remove the LCD hinge Make sure the following FRU or CRU have been removed Remove the lower case on page 30 Remove the LCD bezel on page 52 Remove the bezel cap on page 53 Step 1 Remove six screws Then remove the LCD hinge 54 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 61: ...ok up the Lenovo part number of the following replacement part LCD hinge Remove the LCD hinge cap Make sure the following FRU or CRU have been removed Remove the lower case on page 30 Remove the LCD bezel on page 52 Remove the bezel cap on page 53 Remove the LCD hinge on page 54 Step 1 Pull out the LCD hinge cap from the LCD hinge Chapter 4 Removing a FRU or CRU 55 ...

Страница 62: ...D hinge cap Remove the camera Make sure the following FRU or CRU have been removed Remove the lower case on page 30 Remove the LCD bezel on page 52 Remove the bezel cap on page 53 Remove the LCD hinge on page 54 Remove the LCD panel on page 58 Step 1 Remove the camera 56 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance Manual ...

Страница 63: ...era Remove the microphone FPC Make sure the following FRU or CRU have been removed Remove the lower case on page 30 Remove the LCD bezel on page 52 Remove the bezel cap on page 53 Remove the LCD hinge on page 54 Remove the LCD panel on page 58 Remove the camera on page 56 Step 1 Remove the microphone FPC Chapter 4 Removing a FRU or CRU 57 ...

Страница 64: ... or CRU have been removed Remove the lower case on page 30 Remove the LCD bezel on page 52 Remove the bezel cap on page 53 Remove the LCD hinge on page 54 Step 1 Remove the adhesive tapes as indicated Attention The adhesive tapes cannot be reused Note If the tapes get stuck change the direction to horizontal to remove them 58 Lenovo Legion Y740S 15IRH Lenovo Legion Y740S 15IMH Hardware Maintenance...

Страница 65: ...igure 39 Remove adhesive tapes Step 2 Rotate the LCD panel away from the LCD cover Figure 40 Rotate LCD panel Step 3 Disconnect the LVDS cable Then remove the LCD panel Chapter 4 Removing a FRU or CRU 59 ...

Страница 66: ...or Assistant program 2 Go to https pcsupport lenovo com us en downloads DS543953 to download the installation software Double click the EXE file and follow the on screen instructions to finish the installation 3 Go to C Program files x86 X Rite Color Assistant and locate the ProfileUpdaterForDisplayReplacement exe file Double click the EXE file Follow the on screen instructions to input the displa...

Страница 67: ...Trademarks LENOVO and the LENOVO logo are trademarks of Lenovo All other trademarks are the property of their respective owners 2020 Lenovo ...

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