Lenovo ThinkCentre M75s Gen2 User Manual

Contents
About this manual . . . . . . . . . . . . iii
Chapter 1. Important safety
information. . . . . . . . . . . . . . . . 1
General safety . . . . . . . . . . . . . . . . 1
Electrical safety . . . . . . . . . . . . . . . . 2
Safety inspection guide . . . . . . . . . . . . . 3
Handling electrostatic discharge-sensitive
devices . . . . . . . . . . . . . . . . . . . 4
Grounding requirements . . . . . . . . . . . . 4
Safety notices (multi-lingual translations) . . . . . . 4
Chapter 2. Important service
information. . . . . . . . . . . . . . . 27
Strategy for replacing FRUs . . . . . . . . . . 27
Strategy for replacing a hard disk drive or a
solid-state drive . . . . . . . . . . . . . 27
Important notice for replacing a system
board . . . . . . . . . . . . . . . . . 27
How to use error codes . . . . . . . . . . 28
Strategy for replacing FRUs for CTO, special-bid,
and standard models. . . . . . . . . . . . . 28
Product definition . . . . . . . . . . . . 28
FRU identification . . . . . . . . . . . . 28
Chapter 3. Product overview . . . . . 29
Front . . . . . . . . . . . . . . . . . . . 29
Rear . . . . . . . . . . . . . . . . . . . 30
Chapter 4. Service checkout and
symptom-to-FRU index . . . . . . . . 31
Service checkout . . . . . . . . . . . . . . 31
Problem determination tips . . . . . . . . 31
Symptom-to-FRU index . . . . . . . . . . . 32
Hard disk drive boot error . . . . . . . . . 32
Power supply problems . . . . . . . . . . 33
Beep symptoms . . . . . . . . . . . . . 33
POST error codes . . . . . . . . . . . . 34
Miscellaneous error conditions . . . . . . . 35
Undetermined problems . . . . . . . . . 36
Chapter 5. Troubleshooting,
diagnostics, and recovery . . . . . . . 39
Basic procedure for resolving computer
problems . . . . . . . . . . . . . . . . . 39
Troubleshooting . . . . . . . . . . . . . . 39
Startup problems . . . . . . . . . . . . 40
Audio problems . . . . . . . . . . . . . 41
Network problems . . . . . . . . . . . . 41
Performance problems . . . . . . . . . . 44
Storage drive problems . . . . . . . . . . 45
CD or DVD problems . . . . . . . . . . . 45
Serial connector problems . . . . . . . . . 46
USB device problems . . . . . . . . . . 46
Software problems. . . . . . . . . . . . 47
Diagnostics . . . . . . . . . . . . . . . . 47
Lenovo diagnostic tools . . . . . . . . . . 47
UEFI diagnostic program . . . . . . . . . 47
Recovery . . . . . . . . . . . . . . . . . 48
Restore system files and settings to an earlier
point . . . . . . . . . . . . . . . . . 48
Restore your files from a backup . . . . . . 48
Reset your computer . . . . . . . . . . . 48
Use advanced options . . . . . . . . . . 48
Windows automatic recovery. . . . . . . . 49
Create and use a recovery USB device . . . . 49
Update the device driver . . . . . . . . . 49
Chapter 6. Hardware removal and
installation . . . . . . . . . . . . . . . 51
Handling static-sensitive devices . . . . . . . . 51
Service tool kit . . . . . . . . . . . . . . . 51
Major FRUs and CRUs . . . . . . . . . . . . 52
System board . . . . . . . . . . . . . . . 55
Removing and installing hardware . . . . . . . 56
Vertical stand . . . . . . . . . . . . . . 56
Computer cover . . . . . . . . . . . . . 56
Front bezel . . . . . . . . . . . . . . . 57
Optical drive . . . . . . . . . . . . . . 58
Drive bay assembly . . . . . . . . . . . 60
Hard disk drive . . . . . . . . . . . . . 61
M.2 solid-state drive and heat sink . . . . . 64
M.2 solid-state drive bracket . . . . . . . . 67
Wi-Fi card . . . . . . . . . . . . . . . 67
Front Wi-Fi antenna . . . . . . . . . . . 68
Rear Wi-Fi antenna. . . . . . . . . . . . 68
Memory module . . . . . . . . . . . . . 69
PCI-Express card . . . . . . . . . . . . 70
Coin-cell battery. . . . . . . . . . . . . 71
Power supply assembly . . . . . . . . . . 71
E-lock . . . . . . . . . . . . . . . . . 72
Internal speaker . . . . . . . . . . . . . 73
Illuminated red dot cable . . . . . . . . . 73
Thermal sensor . . . . . . . . . . . . . 74
Front I/O bracket and power button . . . . . 74
Card reader and card reader bracket . . . . . 76
© Copyright Lenovo 2020 i

Lenovo ThinkCentre M75s Gen2 Specifications

General

Graphics	Integrated AMD Radeon Graphics
Memory	Up to 128GB DDR4 3200MHz (4 x UDIMM slots)
Storage	Up to 2 TB 7200 RPM HDD / Up to 1 TB PCIe SSD
Operating System	Windows 10 Pro, Windows 11 Pro
Ports	USB 3.2 Gen 2, USB-C, DisplayPort, HDMI
Network	Gigabit Ethernet, Wi-Fi 6, Bluetooth 5.1
Dimensions	93mm x 298mm x 343.5mm (3.66" x 11.73" x 13.52")
Weight	Starting at 5.4 kg (11.9 lbs)
Front Ports	1 x Headphone/Microphone combo jack
Rear Ports	USB 3.2 Gen 2, USB-C, DisplayPort, HDMI, Ethernet, Serial Port
Expansion Slots	1 x PCIe 3.0 x16, 1 x PCIe 3.0 x1, 1 x M.2
Power Supply	180W, 260W