Replacing The Cmos Battery - NEC PowerMate Enterprise Manual

4-14 Maintenance and Troubleshooting
Problem
Communication
Error

Replacing the CMOS Battery

Remove the 3-volt lithium battery from the system board as follows.
Turn off and unplug the system unit and any external options connected to the
1.
system.
2. Remove the system unit cover as described in Section 3.
Table 4-2 Problems and Solutions
Symptom
Bad data or no data when
communicating.
CAUTION: Removing the battery from the
system board causes the computer to lose system
configuration information. If possible, run Setup
and record the system configuration settings
before removing the battery. Use that
information to restore the system after replacing
the battery.
Solution
1.Check cable connections between
riser board and device.
2. Check that the interface port is
selected.
3. Test or replace the device and
interface cable (see the device
documentation for troubleshooting).
4. Replace the system board.
5. Replace the riser board.