NEC POWERMATE P2166 Manual page 155

Locate the BIOS Recovery jumper J6C2 on the system
3.
board (see the figure "Locating system configuration
jumpers").
4. You may have to remove any installed expansion
boards to access the jumpers (see "Removing
Expansion Boards" in Chapter 3).
Move the jumper block to the Recovery Mode pins.
5.
Replace the system unit cover (see "Replacing the
6.
Desktop Cover" or "Replacing the Minitower Cover"
in Chapter 3).
Connect system power cables and monitor.
7.
Power on the system. The system displays a system
8.
configuration error message.
Power off, unplug the system and monitor, and remove
9.
the cover.
Return the jumper block to the Normal Operation
10.
position.
If you removed any expansion boards, replace them
11.
(see "Replacing Expansion Boards" in Chapter 3).
5-6 Setting System Board Jumpers
BIOS Recovery J6C2
Normal Operation (Default)
Jumper 2-1
Recovery Mode
Jumper 3-2
3 1
6 4
3 1
6 4
BIOS Recovery Jumper