User Guide

Chapter 5 Troubleshooting Guidelines

340S2 56 Rev : B

5.2 VGA controller failure

Symptom: There is no display on both LCD and Monitor although Power-On-

Self-Test is passed

VGA Controller Failure

Try another good monitor or LCD module

Replace faulty LCD or monitor

Display OK

Remove all of I/O devices and cables from M/B except LCD or Monitor

Connect the I/O device & cables to the M/B one per

time to find out which part is causing the problem

Display OK

Replace Motherboard

Board level troubleshooting

Check SIS 630 controller

for cold solder?

solder

Replace the parts one at a time and test after each replacement: VGA controller

Yes