IBM 621410U Hardware Maintenance Manual - Page 53

CMOS recovery jumper, Installing options in a desktop model, Removing the cover

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CMOS recovery jumper The following illustration identifies the CMOS recovery jumper on the system board. CMOS recovery jumper (J33) The CMOS recovery jumper can be used to clear CMOS memory in the event you lose the user password. See "Erasing a lost or forgotten password (clearing CMOS)" on page 28 for information on how to use the CMOS recovery jumper. This jumper is also used to recover from a BIOS failure. See "Recovering from a POST/BIOS update failure" on page 29. Installing options in a desktop model This section provides instructions for installing options in a desktop model. Removing the cover To remove the cover from the desktop model computer, do the following: 1. Review the information in "Before you begin" on page 41 and "Safety information" on page 131. 2. Turn off the computer and all attached devices. 3. Disconnect all external cables and power cords. Installing options 45

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CMOS recovery jumper
The following illustration identifies the CMOS recovery jumper on the system
board.
CMOS recovery
jumper (J33)
The CMOS recovery jumper can be used to clear CMOS memory in the event you
lose the user password. See
“
Erasing a lost or forgotten password (clearing
CMOS)
”
on page 28 for information on how to use the CMOS recovery jumper.
This jumper is also used to recover from a BIOS failure. See
“
Recovering from a
POST/BIOS update failure
”
on page 29.
Installing options in a desktop model
This section provides instructions for installing options in a desktop model.
Removing the cover
To remove the cover from the desktop model computer, do the following:
1.
Review the information in
“
Before you begin
”
on page 41 and
“
Safety
information
”
on page 131.
2.
Turn off the computer and all attached devices.
3.
Disconnect all external cables and power cords.
Installing options
45