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Lenovo ThinkCentre M70c Hardware Maintenance Manual
Also see for ThinkCentre M70c: User guideUser guideSetup guide
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ContentsAbout this manual . . . . . . . . . . . . iiiChapter 1. Important safetyinformation . . . . . . . . . . . . . . . . 1General safety . . . . . . . . . . . . . . . . 1Electrical safety . . . . . . . . . . . . . . . . 2Safety inspection guide . . . . . . . . . . . . . 3Handling electrostatic discharge-sensitivedevices . . . . . . . . . . . . . . . . . . . 4Grounding requirements . . . . . . . . . . . . 4Safety notices (multi-lingual translations) . . . . . . 4Chapter 2. Important serviceinformation . . . . . . . . . . . . . . . 27Strategy for replacing FRUs . . . . . . . . . . 27Strategy for replacing a hard disk drive or asolid-state drive . . . . . . . . . . . . . 27Important notice for replacing a systemboard . . . . . . . . . . . . . . . . . 27How to use error codes . . . . . . . . . . 28Strategy for replacing FRUs for CTO, special-bid,and standard models. . . . . . . . . . . . . 28Product definition . . . . . . . . . . . . 28FRU identification . . . . . . . . . . . . 28Chapter 3. Product overview . . . . . 29Front . . . . . . . . . . . . . . . . . . . 29Rear . . . . . . . . . . . . . . . . . . . 30Chapter 4. Service checkout andsymptom-to-FRU index . . . . . . . . 31Service checkout . . . . . . . . . . . . . . 31Problem determination tips . . . . . . . . 31Symptom-to-FRU index . . . . . . . . . . . 32Hard disk drive boot error . . . . . . . . . 32Power supply problems . . . . . . . . . . 33Beep symptoms . . . . . . . . . . . . . 33POST error codes . . . . . . . . . . . . 34Miscellaneous error conditions . . . . . . . 35Undetermined problems . . . . . . . . . 37Chapter 5. Troubleshooting,diagnostics, and recovery . . . . . . . 39Basic procedure for resolving computerproblems . . . . . . . . . . . . . . . . . 39Troubleshooting . . . . . . . . . . . . . . 39Startup problems . . . . . . . . . . . . 40Audio problems . . . . . . . . . . . . . 41Network problems . . . . . . . . . . . . 41Performance problems . . . . . . . . . . 44Storage drive problems . . . . . . . . . . 45CD or DVD problems . . . . . . . . . . . 45Serial connector problems . . . . . . . . . 46USB device problems . . . . . . . . . . 46Software problems . . . . . . . . . . . . 47Diagnostics . . . . . . . . . . . . . . . . 47Lenovo diagnostic tools . . . . . . . . . . 47UEFI diagnostic program . . . . . . . . . 47Recovery . . . . . . . . . . . . . . . . . 48Restore system files and settings to an earlierpoint . . . . . . . . . . . . . . . . . 48Restore your files from a backup . . . . . . 48Reset your computer . . . . . . . . . . . 48Use advanced options . . . . . . . . . . 48Windows automatic recovery. . . . . . . . 49Create and use a recovery USB device . . . . 49Update the device driver . . . . . . . . . 49Chapter 6. Hardware removal andinstallation . . . . . . . . . . . . . . . 51Handling static-sensitive devices . . . . . . . . 51Service tool kit . . . . . . . . . . . . . . . 51Major FRUs and CRUs . . . . . . . . . . . . 52System board . . . . . . . . . . . . . . . 54Removing and installing hardware . . . . . . . 54Vertical stand . . . . . . . . . . . . . . 55Computer cover . . . . . . . . . . . . . 56Front bezel . . . . . . . . . . . . . . . 57PCI-Express card . . . . . . . . . . . . 58Optical drive . . . . . . . . . . . . . . 60Hard disk drive . . . . . . . . . . . . . 62Memory module . . . . . . . . . . . . . 67Coin-cell battery. . . . . . . . . . . . . 68M.2 solid-state drive . . . . . . . . . . . 70Wi-Fi card . . . . . . . . . . . . . . . 73Heat sink and fan assembly . . . . . . . . 75Front Wi-Fi antenna . . . . . . . . . . . 76Rear Wi-Fi antenna. . . . . . . . . . . . 77Internal speaker . . . . . . . . . . . . . 79ThinkCentre LED dot . . . . . . . . . . . 80Card reader . . . . . . . . . . . . . . 81Power supply assembly . . . . . . . . . . 83Microprocessor . . . . . . . . . . . . . 84Cover presence switch . . . . . . . . . . 87System board . . . . . . . . . . . . . . 88© Copyright Lenovo 2021 i |
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