Removing And Installing Hardware; External Options; Computer Stand - Lenovo ThinkCentre M90a Gen 3 Hardware Maintenance Manual

1
LCD backlight connector
3
GPU board connector
5
Integrated camera and microphone module connector
7
Cover presence switch connector (intrusion switch
connector)
9
Hard disk drive power connector
11
LCD LVDS2 connector
13
SATA1 (SATA 3.0)
15
Serial (COM1) connector
17
DisplayPort out connector
19
Ethernet connector
21
USB 3.2 connectors Gen 1
23
Radar card connector
25
Memory slot (DDR5 DIMM1)
27
Headset connector
29
USB 3.2 connector Gen 2
31
Clear CMOS (Complementary Metal Oxide
Semiconductor) / Recovery jumper

Removing and installing hardware

This section provides instructions on how to remove and install hardware for your computer. You can expand
the capabilities of your computer and maintain your computer by removing or installing hardware.
Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 "Important safety information" on page 1.

External options

You can connect external options to your computer, such as external speakers, a printer, or a scanner. For
some external options, you must install additional software in addition to making the physical connection.
When installing an external option, see Chapter 3 "Product overview" on page 29 to identify the required
connector. Then, use the instructions that come with the option to help you make the connection and install
any required software or device drivers.

Computer stand

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
For access, do the following:
1. Turn off the computer and remove all connected devices and cables.
2. Disconnect the computer from ac power and all connected cables.
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M90a Gen 3 and M90a Pro Gen3 Hardware Maintenance Manual
2
M.2 solid-state drive slot
4
Microprocessor socket
6
System fan connector
8
Optical drive power connector
10
Power supply unit connector
12
M.2 Wi-Fi card slot
14
LCD LVDS1 connector
16
SATA2 (SATA 3.0)
18
HDMI in and out connector
20
USB-C (3.2 Gen 2) connector
22
Speaker connector
24
Memory slot (DDR5 DIMM2)
26
Card reader connector
28
USB 3.2 connector Gen 2
30
USB 3.2 connector Gen 2
32
Coin-cell battery