mitac 8355.pdf - tim.id.au
mitac 8355.pdf - tim.id.au
mitac 8355.pdf - tim.id.au
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8.5 External Monitor No Display<br />
1. Confirm monitor is good and check<br />
the cable are connected properly.<br />
2. Try another known good monitor.<br />
Remove all the I/O device & cable from<br />
motherboard except monitor.<br />
8355 N/B MAINTENANCE<br />
Symptom:<br />
The CRT monitor shows nothing or abnormal color, but it is OK for LCD.<br />
AGP Controller Failure<br />
Display<br />
OK?<br />
No<br />
Display<br />
OK?<br />
No<br />
Yes<br />
Yes<br />
Replace f<strong>au</strong>lty monitor.<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 />
Board-level<br />
Troubleshooting<br />
Replace<br />
Motherboard<br />
Check if<br />
U505, J504<br />
are cold solder?<br />
No<br />
Yes<br />
Re-soldering.<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 />
M/B<br />
U506<br />
J503<br />
U9<br />
U16<br />
R94<br />
C211<br />
R505<br />
R508<br />
Q502<br />
Q1<br />
Q2<br />
Q3<br />
RP516<br />
CP502<br />
X3<br />
R139<br />
R141<br />
L30-L36<br />
CRT-DDCK<br />
CRT_DDDA<br />
CRT_VSYNC<br />
CRT_HSYNC<br />
CRT_RED<br />
CRT_GREEN<br />
CRT_BLUE<br />
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