mitac 8599.pdf - tim.id.au
mitac 8599.pdf - tim.id.au
mitac 8599.pdf - tim.id.au
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8599 N/B Maintenance<br />
8.4 LCD No Display or Picture Abnormal (1)<br />
There is no display or picture abnormal on LCD or monitor.<br />
VGA Controller Failure<br />
1. Confirm LCD is good and check the cable<br />
are connected properly.<br />
2. Try another known good LCD<br />
Display<br />
OK?<br />
No<br />
Remove all the I/O device & cable from<br />
motherboard except extended LCD.<br />
Display<br />
OK?<br />
No<br />
Yes<br />
Yes<br />
Replace f<strong>au</strong>lty LCD<br />
Connect the I/O device & cable<br />
to the M/B one at a <strong>tim</strong>e to find<br />
out which part is c<strong>au</strong>sing the<br />
problem.<br />
Replace<br />
Motherboard<br />
Board-level<br />
Troubleshooting<br />
One of the following parts on the mother-board may be<br />
defective, use an oscilloscope to check the following signal or<br />
replace the parts one at a <strong>tim</strong>e and test after each replacement.<br />
Parts: Signals:<br />
U12<br />
U9<br />
J6<br />
U17<br />
L2<br />
L3<br />
L22<br />
RP1<br />
RP2<br />
Q4<br />
Q5<br />
R26<br />
+3VS<br />
DVMAIN<br />
LCDVCC<br />
IXOUT2<br />
LCD_ID[0:2]<br />
TXOUT[0:2]+<br />
TXOUT[0:2]-<br />
TXCLK+<br />
TXCLK-<br />
+12VS<br />
ENPBLT<br />
ENAVDD<br />
BLADJ<br />
105
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