User`s guide

5.9 Jumper Settings
Explanation of Jumpers
To modify the operation of the serverboard, jumpers can be used to choose between
optional settings. Jumpers create shorts between two pins to change the function of the
connector. Pin 1 is identified with a square solder pad on the printed circuit board. See the
serverboard layout pages for jumper locations.
Figure 5-5. Jumper Settings
Note On a two pin jumper, "Closed" means the jumper is on both pins and "Open" means the
jumper is either on only one pin or completely removed.
CMOS Clear
JBT1 is used to clear CMOS (which will also clear any passwords). Instead of pins, this
jumper consists of contact pads to prevent accidentally clearing the contents of CMOS.
To Clear CMOS
1. First power down the system and unplug the power cord(s).
2. With the power disconnected, short the CMOS pads with a metal object such as a
small screwdriver.
3. Remove the screwdriver (or shorting device).
4. Reconnect the power cord(s) and power on the system.
Note Do not use the PW_ON connector to clear CMOS.
Chapter 5. Advanced Serverboard Setup 41