Replacing The Cmos Battery - NEC POWERMATE ENTERPRISE NETPC Service Manual

Problem
Network Error
I/O Device Error
Communication
Error

Replacing the CMOS Battery

Remove the 3-volt lithium battery from the system board as follows.
1. Turn off and unplug the system unit and any external options connected to the
system.
2. Remove the system unit stand and cover as described in Section 3.
Table 4-2 Problems and Solutions
Symptom
Bad data or no data when
communicating.
Bad data or no data when
communicating.
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.
Maintenance and Troubleshooting
Solution
1. Check connection of network cable to
RJ-45 LAN connector on riser card.
2. Check that the LAN port is enabled.
3. Check condition of network cable.
4. Replace riser card.
1. Reseat PCI expansion board in
expansion slot on riser card.
2. Replace PCI expansion board.
3. Replace riser card.
4. Replace system board.
1. Check cable connections between
system board device port 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.
4-13