User Guide

8081
8081
N/B Maintenance
N/B Maintenance
106
Display
OK?
Replace faulty
LCD or monitor.
Display
OK?
VGA Controller Failure
LCD No Display
1. Confirm LCD panel or monitor is good
and check the cable are connected
properly.
2. Try another known good monitor or
LCD module.
Remove all the I/O device & cable from
motherboard except LCD panel or
extended monitor.
Connect the I/O device & cable to
the M/B one at a time to find out
which part is causing the problem.
Yes
No
Yes
No
Re-soldering.
One of the following parts on the mother-board may be
defective, use an oscilloscope to check the following signal or
replace the parts one at a time and test after each replacement.
Parts: Signals:
Board-level
Troubleshooting
Replace
Motherboard
Yes
No
U502
U9
U520
J3
J2
D501
Q501
F1
Q1
L11
Q22
Q23
+3V
LCDVCC
FPVDD
LCD_ID[0:2]
TXOUT[0:2]+
TXOUT[0:2]-
TXCLKOUT[0]+
TXCLKOUT[0]-
ENBL
PCIRST#
LID#
ENABLE_BKLT
8.3 VGA Controller Failure LCD No Display
There is no display or picture abnormal on LCD although power-on-self-test is passed.
Check if
U502, J3 are cold
solder?
SW6
U11
JL9
Q21
L501
L502
L503
L504
F503