Lenovo Legion Y740 Series, Hardware Maintenance Manual

Page 1: ...Hardware Maintenance Manual Lenovo Legion Y740 Series ...

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Page 3: ...Hardware Maintenance Manual Lenovo Legion Y740 Series ...

Page 4: ...First Edition December 2018 Copyright Lenovo 2018 ...

Page 5: ... Removing a FRU or CRU 33 General guidelines 33 Remove the lower case 33 Remove the battery pack 34 Remove the M 2 solid state drive 36 Remove the coin cell battery 38 Remove the storage drive for selected models 39 Remove the memory module 42 Remove the Wi Fi card 44 Remove the subwoofer for Lenovo Legion Y740 17 47 Remove the heat sink and fan assembly 48 Remove the speakers 50 Remove the I O bo...

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Page 7: ...e 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 might be hazardou...

Page 8: ...efully for possible hazards in your work area Examples of these hazards are moist 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 power on when...

Page 9: ...d 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 that the ESD protective devi...

Page 10: ...g of the electrical outlet 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 Hardware Maintenance Manual ...

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

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

Page 14: ...PERIGO PERIGO PERIGO PERIGO PERIGO 8 Hardware Maintenance Manual ...

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

Page 16: ...DANGER DANGER DANGER DANGER VORSICHT 10 Hardware Maintenance Manual ...

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

Page 18: ...VORSICHT VORSICHT VORSICHT 12 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: ...careful not to replace a nondefective FRU What to do first When 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 in...

Page 28: ...o the information in this topic to check the ac power adapter If the power on indicator does not turn on check the power cord of the ac power adapter for correct continuity and installation To check the ac power adapter do the following 1 Unplug the ac power adapter cable from the computer 2 Measure the output voltage across the plug of the ac power adapter cable The correct voltages are shown in ...

Page 29: ...ac power adapter self service power cord self service Chapter 2 General checkout 23 ...

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Page 31: ...ed illustrations help Lenovo service technicians identify FRUs or CRUs that they may need to replace when servicing a customer s computer Lenovo Legion Y740 15 1 2 4 5 6 11 12 13 9 14 15 21 2 20 19 17 16 10 8 18 8 3 7 Figure 1 Lenovo Legion Y740 15 exploded view Copyright Lenovo 2018 25 ...

Page 32: ...System board No No 7 I O board No No 8 Speakers No No 9 heat sink and fan assembly No No 10 Memory module No No 11 Memory module shield No No 12 Coin cell battery No No 13 Wi Fi card No No 14 Sponge No No 15 M 2 solid state drive No No 16 M 2 solid state drive bracket No No 17 Storage drive cable No No 18 Storage drive No No 19 Storage drive bracket No No 20 Battery pack No No 21 Lower case No No ...

Page 33: ... Table 2 FRU categories for the LCD module Lenovo Legion Y740 15 No FRU CRU category Self service CRU Optional service CRU 1 LCD bezel No No 2 LCD panel No No 3 Hinges No No 4 Camera and microphone board No No 5 LCD base cover No No Chapter 3 Identifying FRUs CRUs 27 ...

Page 34: ... Lenovo Legion Y740 17 exploded view Table 3 FRU CRU categories Lenovo Legion Y740 17 No FRU CRU category Self service CRU Optional service CRU 1 LCD module No No 2 Hinge cover kit No No 3 Strip cover No No 4 Upper case with keyboard No No 5 K lock bracket No No 28 Hardware Maintenance Manual ...

Page 35: ...e No No 11 Memory module shield No No 12 Subwoofer No No 13 Coin cell battery No No 14 Wi Fi card No No 15 Sponge No No 16 M 2 solid state drive No No 17 M 2 solid state drive bracket No No 18 Storage drive cable No No 19 Storage drive No No 20 Storage drive bracket No No 21 Battery pack No No 22 Lower case No No Chapter 3 Identifying FRUs CRUs 29 ...

Page 36: ...ew Table 4 FRU categories for the LCD module Lenovo Legion Y740 17 No FRU CRU category Self service CRU Optional service CRU 1 LCD bezel No No 2 LCD panel No No 3 Hinges No No 4 Camera and microphone board No No 5 LCD base cover No No 30 Hardware Maintenance Manual ...

Page 37: ...Miscellaneous parts Table 5 Miscellaneous parts FRU descriptions Self service CRU Optional service CRU Screw pack No No Tape No No Rubber No No Thermalpad No No Chapter 3 Identifying FRUs CRUs 31 ...

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Page 39: ...replacement screws and order them through the Lenovo CRM system 7 When replacing the base cover reapply all labels that come with the replacement base cover If some original labels are not included with the replacement base cover peal them off from the original base cover and paste them on the replacement base cover DANGER Before removing any FRU or CRU shut down the computer and unplug all power ...

Page 40: ...ve the lower case Figure 6 Remove the lower case Remove the battery pack Make sure the following FRUs or CRUs have been removed Remove the lower case on page 33 Step 1 Disconnect the cable from the system board Attention Use your fingernail to pull the connector to unplug it Do not pull the cable 34 Hardware Maintenance Manual ...

Page 41: ...Lenovo Legion Y740 15 Figure 8 Disconnect the cable Lenovo Legion Y740 17 Step 2 Remove screws as shown Figure 9 Remove screws Lenovo Legion Y740 15 Screw specifications Number of screws M2 0 x 4 4 Chapter 4 Removing a FRU or CRU 35 ...

Page 42: ... battery pack Figure 11 Take out the battery pack Lenovo Legion Y740 15 Figure 12 Take out the battery pack Lenovo Legion Y740 17 Remove the M 2 solid state drive Make sure the following FRUs or CRUs have been removed Remove the lower case on page 33 Remove the battery pack on page 34 36 Hardware Maintenance Manual ...

Page 43: ...r of screws M2 0 x 4 1 Figure 14 Remove 1 screw Lenovo Legion Y740 17 Screw specifications Number of screws M2 0 x 4 1 Step 2 Remove the solid state drive by pulling it away from the slot Figure 15 Remove by pulling the M 2 solid state drive Lenovo Legion Y740 15 Chapter 4 Removing a FRU or CRU 37 ...

Page 44: ...ve the battery pack on page 34 Remove the M 2 solid state drive on page 36 Note For Lenovo Legion Y740 17 you have to remove the solid state drive before removing the RTC battery Step 1 Disconnect the cable from the system board Attention Use your fingernail to pull the connector to unplug it Do not pull the cable Figure 17 Disconnect the cable Lenovo Legion Y740 15 38 Hardware Maintenance Manual ...

Page 45: ...y Lenovo Legion Y740 15 Figure 20 Remove the coin cell battery Lenovo Legion Y740 17 Remove the storage drive for selected models Make sure the following FRUs or CRUs have been removed Remove the lower case on page 33 Remove the battery pack on page 34 Step 1 Disconnect the cable from the system board Chapter 4 Removing a FRU or CRU 39 ...

Page 46: ...able Lenovo Legion Y740 15 Figure 22 Disconnect the cable Lenovo Legion Y740 17 Step 2 Remove 4 screws Figure 23 Remove screws Lenovo Legion Y740 15 Screw specifications Number of screws M2 0 x 4 4 40 Hardware Maintenance Manual ...

Page 47: ...s M2 0 x 4 4 Step 3 Remove the storage drive Figure 25 Remove the storage drive Lenovo Legion Y740 15 Figure 26 Remove the storage drive Lenovo Legion Y740 17 Step 4 Remove 4 screws to release the metal frame and then remove the storage drive cable Chapter 4 Removing a FRU or CRU 41 ...

Page 48: ...cket Lenovo Legion Y740 17 Screw specifications Number of screws M3 0 x 3 4 Remove the memory module Make sure the following FRUs or CRUs have been removed Remove the lower case on page 33 Remove the battery pack on page 34 Step 1 Remove the memory module shield Figure 29 Remove memory module shield Lenovo Legion Y740 15 42 Hardware Maintenance Manual ...

Page 49: ... Y740 17 Step 2 Pull the retaining tags on both sides of the slot outwards to release the memory module Remove the memory module by pulling it away from the slot Figure 31 Remove the memory module Lenovo Legion Y740 15 Chapter 4 Removing a FRU or CRU 43 ...

Page 50: ...ove the Wi Fi card Make sure the following FRUs or CRUs have been removed Remove the lower case on page 33 Remove the battery pack on page 34 Step 1 Remove sponge on the Wi Fi card Figure 33 Remove the sponge Lenovo Legion Y740 15 44 Hardware Maintenance Manual ...

Page 51: ...ion Y740 17 Step 2 Disconnect the main and auxiliary antenna cables Figure 35 Disconnect antenna cables Lenovo Legion Y740 15 Figure 36 Disconnect antenna cables Lenovo Legion Y740 17 Step 3 Remove 1 screw Chapter 4 Removing a FRU or CRU 45 ...

Page 52: ...Number of screws M2 0 x 4 1 Figure 38 Remove 1 screw Lenovo Legion Y740 17 Screw specifications Number of screws M2 0 x 4 1 Step 4 Remove the Wi Fi card by pulling it away from the slot Figure 39 Remove the Wi Fi card Lenovo Legion Y740 15 46 Hardware Maintenance Manual ...

Page 53: ...te This part is available only on Lenovo Legion Y740 17 Remove the lower case on page 33 Remove the battery pack on page 34 Step 1 Disconnect the cable from the system board Figure 41 Disconnect the cable Lenovo Legion Y740 17 Step 2 Carefully take out the subwoofer Figure 42 Take out the subwoofer Lenovo Legion Y740 17 Chapter 4 Removing a FRU or CRU 47 ...

Page 54: ...ve the battery pack on page 34 Remove the Wi Fi card on page 44 Remove the subwoofer for Lenovo Legion Y740 17 on page 47 Step 1 Disconnect the cable from the system board Figure 43 Disconnect the cable Lenovo Legion Y740 15 Figure 44 Disconnect the cable Lenovo Legion Y740 17 Step 2 Remove 6 screws 48 Hardware Maintenance Manual ...

Page 55: ...mber of screws M2 0 x 4 6 Figure 46 Remove 6 screws Lenovo Legion Y740 17 Screw specifications Number of screws M2 0 x 4 6 Step 3 Remove the heat sink and fan assembly Figure 47 Remove the heat sink and fan assembly Lenovo Legion Y740 15 Chapter 4 Removing a FRU or CRU 49 ...

Page 56: ...ers Make sure the following FRUs CRUs have been removed Remove the lower case on page 33 Remove the battery pack on page 34 Step 1 Disconnect the cable Figure 49 Disconnect the cable Lenovo Legion Y740 15 Figure 50 Disconnect the cable Lenovo Legion Y740 17 50 Hardware Maintenance Manual ...

Page 57: ...ollowing FRUs or CRUs have been removed Remove the lower case on page 33 Remove the battery pack on page 34 Remove the Wi Fi card on page 44 Remove the subwoofer for Lenovo Legion Y740 17 on page 47 Remove the heat sink and fan assembly on page 48 Remove the speakers on page 50 Step 1 Disconnect the cable between the I O board and the system board Chapter 4 Removing a FRU or CRU 51 ...

Page 58: ...able Lenovo Legion Y740 15 Figure 54 Disconnect the cable Lenovo Legion Y740 17 Step 2 Remove 1 screw Figure 55 Remove 1 screw Lenovo Legion Y740 15 Screw specifications Number of screws M2 0 x 4 1 52 Hardware Maintenance Manual ...

Page 59: ...novo Legion Y740 17 Screw specifications Number of screws M2 0 x 4 1 Step 3 Remove the I O board Figure 57 Remove I O board Lenovo Legion Y740 15 Figure 58 Remove I O board Lenovo Legion Y740 17 Chapter 4 Removing a FRU or CRU 53 ...

Page 60: ...e drive on page 36 Remove the Wi Fi card on page 44 Remove the subwoofer for Lenovo Legion Y740 17 on page 47 Remove the heat sink and fan assembly on page 48 Remove the speakers on page 50 Remove the I O board on page 51 Step 1 Remove 1 screw Figure 59 Remove 1 screw Lenovo Legion Y740 15 Screw specifications Number of screws M2 0 x 4 1 Figure 60 Remove 1 screw Lenovo Legion Y740 17 Screw specifi...

Page 61: ...ovo Legion Y740 15 Figure 62 Remove the K lock bracket Lenovo Legion Y740 17 Step 3 Disconnect the cables from the system board including the touch pad cable and the display panel cable Figure 63 Disconnect the cable Lenovo Legion Y740 15 Chapter 4 Removing a FRU or CRU 55 ...

Page 62: ...m board Lenovo Legion Y740 15 Figure 66 Remove the system board Lenovo Legion Y740 17 Disassemble the LCD module The LCD module as a whole is not a FRU Instead it contains FRUs as its components Before disassembling the LCD module make sure it has been detached from the base cover 56 Hardware Maintenance Manual ...

Page 63: ...42 Remove the M 2 solid state drive on page 36 Remove the Wi Fi card on page 44 Remove the speakers on page 50 Remove the subwoofer for Lenovo Legion Y740 17 on page 47 Remove the heat sink and fan assembly on page 48 Remove the I O board on page 51 Remove the system board on page 54 Step 1 Use a prying tool to remove the strip cover Figure 67 Pry off the strip cover Step 2 Remove 2 screws which s...

Page 64: ... 69 Remove the hinge cover Step 4 Remove 6 screws a a a a b b Figure 70 Remove 6 screws Screw specifications Number of screws M2 5 x 5 1 4 M2 0 x 2 2 2 Step 5 Remove 6 screws Figure 71 Remove the LCD module 58 Hardware Maintenance Manual ...

Page 65: ... pull the LCD bezel outwards Repeat this action along the inner edges of the LCD bezel until all hooks that secure the LCD bezel are detached Figure 72 Pull the inner sides of the LCD bezel Lenovo Legion Y740 15 Figure 73 Pull the inner sides of the LCD bezel Lenovo Legion Y740 17 Chapter 4 Removing a FRU or CRU 59 ...

Page 66: ...ep 2 Remove the LCD bezel Remove the hinges Make sure the following FRUs or CRUs have been removed Remove the LCD bezel on page 59 Step 1 Remove 6 screws Figure 74 Remove 6 screws Lenovo Legion Y740 15 Screw specifications Number of screws M2 5 x 2 5 6 Figure 75 Remove 6 screws Lenovo Legion Y740 17 Screw specifications Number of screws M2 5 x 2 5 6 Step 2 Remove the hinges 60 Hardware Maintenance...

Page 67: ...ge 60 Step 1 For Lenovo Legion Y740 15 pull the two tapes located on left and right edges under the LCD panel downwards steadily With the bottom edge as an axis lift up the top edge of the LCD panel Attention Do not remove the LCD panel at this step The LCD panel is connected by a cable at the back side Detach the cable before removing the LCD panel Figure 78 Pull the tape Lenovo Legion Y740 15 Ch...

Page 68: ...7 Step 2 Check the back side of the LCD panel for the LCD connector and then unplug the LCD cable Figure 80 Disconnect the LCD cable Lenovo Legion Y740 15 Figure 81 Disconnect the LCD cable Lenovo Legion Y740 17 Step 3 Carefully remove the LCD panel as shown 62 Hardware Maintenance Manual ...

Page 69: ...17 Remove the camera and microphone board Make sure the following FRUs or CRUs have been removed Remove the LCD bezel on page 59 Remove the hinges on page 60 Remove the LCD panel on page 61 Step 1 Disconnect the cable Figure 84 Disconnect the cable Lenovo Legion Y740 15 Chapter 4 Removing a FRU or CRU 63 ...

Page 70: ...vo Legion Y740 17 Step 2 Remove the camera and microphone board Figure 86 Remove the camera and microphone board Lenovo Legion Y740 15 Figure 87 Remove the camera and microphone board Lenovo Legion Y740 17 64 Hardware Maintenance Manual ...

Page 71: ...e base cover Lenovo Legion Y740 15 a b c d e f g h i j Figure 89 Label layout on the back side of the base cover Lenovo Legion Y740 17 Labels attached to the base cover are country region specific Make sure to apply the appropriate labels to the replacement base cover Copyright Lenovo 2018 65 ...

Page 72: ...ndonesia 15 mm x 10 mm c South Africa label South Africa 20 mm x 10 mm d Adapter label 65 mm x 20 mm e Israel US CA TW label Israel US CA Taiwan 32 mm x 10 mm f W L label Argentina 68 mm x 6 mm g Brazil lable Brazil 35 mm x 15 mm h Indonesia rating label Indonesia 26 mm x 10 mm I TW label Taiwan 70 mm x 10 mm j Korea KCC label Korea 50 mm x 43 mm 66 Hardware Maintenance Manual ...

Page 73: ...Trademarks Lenovo the lenovo logo and Legion are trademarks of Lenovo in the United States other countries or both Other company product or service names may be trademarks or service marks of others ...

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