![background image](http://html.mh-extra.com/html/nec/powermate-professional-9000e-service/powermate-professional-9000e-service_service-manual_248711141.webp)
8-6 Troubleshooting
Speaker volume is too low.
Adjust the volume control on the speaker. If the volume is still too low,
adjust the volume through the system software. See the Windows
Multimedia online help.
Sound is only coming from one speaker.
Balance the speaker output by adjusting the balance in the sound
software. See the Windows Multimedia online help.
Diagnostics
One beep indicates that the system has completed its POST test. If intermittent
beeping occurs, power off the system and try again. If the beeping persists, see
the following table. The table summarizes problems that may develop during
system operation and lists (in sequential order) suggested corrective actions.
Problems and Solutions
Problem
Symptom
Solution
No power
Power lamp on computer status
panel does not light.
1. Check that the power cord is plugged
into the power socket on the computer.
Check that the other end of the cord is
plugged into a live, properly grounded AC
power outlet.
2. Check cable connections between the
power supply and riser board and between
the riser board and power switch.
3. Systematically eliminate possible
shorted PCBs by removing cables and
expansion boards.
4. Check the +5 and +12 power supply
voltages (see Section 4 “System Board”).
Measure voltages with the system board
installed.
5. Replace the power switch assembly.
6. Replace the power supply.
7. Replace the system board.
Power supply
malfunction
Any of the following conditions
could occur:
Front panel lamps out, diskette
and/or hard drives do not spin,
monitor blank, interface ports not
working, and keyboard lamp out
and/or cannot input from keyboard.
1. Perform steps 1 through 4 listed in this
table under No Power.
2. Check power supply voltages. Voltages
should be measured with a load on them
(system board plugged in). See Section 4
for connector pin assignments and Section
10 for power supply specifications.
3. Replace the power supply.
Summary of Contents for POWERMATE PROFESSIONAL 9000E - SERVICE
Page 14: ...1 System Overview Configurations Features Components ...
Page 92: ...4 System Board Sockets and Connectors Jumpers Components Resources ...
Page 120: ...5 Expansion Boards Sound Board Graphics Board Network Board ...
Page 132: ...7 Preventive Maintenance System Cleaning Keyboard Cleaning Mouse Cleaning ...
Page 136: ...8 Troubleshooting Checklist Diagnostics ...
Page 176: ...A Release Notes General Notes Windows NT Issues ...