Service manual

6.3. NO DISPLAY
NTSC
TV
YPb Pr S-VIDEO
No
No
Replace I106
No
Replace LVDS Wire
No
Check inverter wire from
power board to panel is OK?
Replace Inverter Wire
No
Replace Panel
AV
No No
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Check Video wave form is
on I804 Pin21 ?
Check Q802,C886 is OK?
Check I106 has output
signal at Pin13~22 of P803
?
Check the LVDS wire from
P803 to panel is OK?
Replace Q802 or C886
Replace I804
Check
L816,R172,R173,C332,C33
4 is OK?
Replace L816,R172
R173,C332,or C334
Check L821,R203,C335 is
OK?
Replace L821,R203, or
C335
Check L819,R197,C340 is
OK?
Replace L819,R197 or
C340
ViewSonic Corporation Confidential - Do Not Copy N4251w-1M
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