System Board; Removing And Installing Hardware; External Options - Lenovo ThinkCentre M90n-1 Hardware Maintenance Manual

System board

1
Clear CMOS (Complementary Metal Oxide
Semiconductor) / Recovery jumper
3
Wi-Fi card slot
5
Internal speaker connector
7
M.2 solid-state drive slot 2 (for M.2 TG solid-state
drive)
9
Wireless WAN (Wireless Wide Area Network) card slot*
* for selected models

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
2 "Important safety information" on page 27.

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
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M90n-1 Hardware Maintenance Manual
2
Coin-cell battery connector
4
Cover presence switch connector (intrusion switch
connector)
6
M.2 solid-state drive slot 1 (for M.2 SATA solid-state
drive)
8
Nano-SIM (Subscriber Identification Module) card slot*