IBM Aptiva 2142 - Manual (Page 143)

2090—System Board
Adapter cards if applicable.
Disconnect any cables necessary for removal.
Memory (DIMM) (2051) if applicable.
Notes:
1. Be certain to reinstall the processor and DIMMs, in the new system
board if applicable.
2. The amplifier card BIOS in the system board must match the amplifier
card installed in the computer. See “Amplifier Card BIOS” on
page 1-16.
3. Run the Setup Utility after changing the system board.
Repair Information 4-15