MiTAC E-8590, Service Manual, Page: 175 / 252

174
LCD PC E
LCD PC E
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8590 MAINTENANCE
8590 MAINTENANCE
Connect the I/O device & cable
to the M/B one at a time to find
out which part is causing the
problem.
1.Confirm LCD panel and check the
cable are connected properly.
2. Try another known good
LCD module.
Replace faulty
LCD
VGA Controller Failure
Display
OK?
Remove all the I/O device & cable from
motherboard except LCD panel
Display
OK?
Yes
No
Yes
No
Board-level
Troubleshooting
Replace
Motherboard
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:
PANEL_HS
PANEL_VS
PANEL_DE
PANEL_CLK
TXT0[B0,B5]
TXT0[G0,G5]
TXT0[R0,R5]
TXT1[B0,B5]
TXT1[G0,G5]
TXT1[R0,R5]
LCD-ID0
LCD_ID1
LCD_ID2
U5
U4
J8
J9
L8
L7
L6
L5
CP15
CP16
CP14 RP53
RP54
RP52
FA4
FA3
FA5
FA2
FA1
R58
R61
F2
8.3 VGA Controller Failure LCD No Display
Symptom: There is no display on LCD although power-on-self-test is passed.