Section 5: Troubleshooting
5- 3
5.6.1 AC Power
Most AC power problems result in one of two symptoms. Either there is no
response when the ON/STANDBY button is pressed, or the microprocessor
failure alarm sounds. If the microprocessor failure alarm sounds and an error
code is displayed, refer to paragraph 5.6.2. Otherwise, refer to Table 5-2.
Table 5-2: Power Problems
Condition
Recommended Action
1. The N -3100 fails to
turn on when the
ON/STANDBY
button is pressed.
1. If the N-3100 is powered by an SPS external
power supply, ensure that the power supply is
plugged into an operational AC outlet. If it is,
and the green POWER AVAILABLE indicator is
not lit, replace the power supply.
2. If the N-3100 is powered by an SPS external
power supply and the green power supply
POWER AVAILABLE indicator is lit, ensure that
the power supply is properly plugged into the
N-3100.
3. If the N-3100 is stacked with the N -3200, ensure
that the N-3200 is plugged into an operational
AC outlet. If it is, and the N-3200 POWER ON
indicator is not lit, troubleshoot the N -3200.
4. If the N-3100 is stacked with the N -3200 and the
N-3200 POWER ON indicator is lit, ensure that
the N -3200 is properly stacked with the N-3100.
5. Check the N-3100 fuse. The fuse is located on the
Lower Docking Connector PCB as indicated in
paragraph 6.2 of the Disassembly Guide section.
Replace if necessary.
6. Check the ribbon connector from the bottom
enclosure to the UIF PCB. If the connection is
good, replace the UIF PCB.
2. The microprocessor
failure alarm
sounds and no
error code is
displayed.
Replace the UIF PCB.
