Power No Work Troubleshooting - BenQ GW2760HS Service Manual

5.5.3 Power no work troubleshooting

Check I/F BD No
No
Replace IC851 IC801 No
Replace Q821,
Replace
No
Q801,D802 D821
No Backlight
+23V +18V ok? No
Yes
+5V ok? No
Yes
Check CN701 pin2
(BL-ON) is Hi?
Yes
Check CN701 pin1
(BRT-ADJ) exist?
Yes
Check IC851 IC801
OK?
Yes
Check Q821,D821
Check Q801, Q801,D802
D802 OK?
OK?
Yes
Check Panel
- 52 -
Check
D702
D701/D702 No
OK?
Yes
Check D705 D701
No
OK?
Yes
Check F601,
No
Q601, R615 OK?
Yes
Reaplce IC601
Replace D701/D702 D702
Replace D705 D701
Replace F601,
Q601, R615.