Speaker Problems; Diagnostics; Problems And Solutions - NEC PowerMate VT 300i Series Service And Reference Manual

T
The CD-ROM drive plays music CDs but the sound is not heard.
However, .WAV and .MIDI sounds can be heard when played.
Check that the cable connecting the CD-ROM drive to the system board
CD audio connector is in place and secure.
Check the CD Audio volume setting.

Speaker Problems

Check the following problems to see the possible cause and solution.
T
No sound from the speakers.
Check that the speaker power is on. Verify that all speaker cable
connections are correct and secure.
Check that the power adapter is connected to the power source and the
speaker.
T
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.
T
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.
Problem Symptom
No power Power lamp on computer front
panel does not light.
7-6 Troubleshooting

Problems and Solutions

Solution
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 system board and
between the system board and power
switch.
3. Systematically eliminate possible
shorted PCBs by removing cables and
expansion boards.