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5
Power Board no work troubleshooting:
No Backlight
V-inverter ok?
No
Check
D703/D704
OK?
No
Yes
Replace D703/D704
No
Check F601,
Q601, R615 OK?
Yes
Replace F601,
Q601, R615.
No
Check I/F BD
Yes
+5V ok?
Yes
Check CN701 pin2
(BL-ON) is Hi?
Yes
Check CN701 pin1
(BRT-ADJ) exist?
Yes
Check I/F BD
Yes
Replace IC801
No
Yes
Replace Q808,
Q810, T801, T802.
No
Check Panel
Yes
No
No
Check
D701/D702
OK?
Replace D701/D702
No
Check Q808, Q810,
T801, T802 OK?
Check IC801
OK?
Summary of Contents for G225HQ
Page 22: ... 22 3 9 Packing ...
Page 23: ... 23 4 Disassembly Assembly 4 1 Exploded View ...
Page 24: ... 24 ...
Page 46: ... 46 5 4 OSD Operation Guide ...
Page 47: ... 47 ...
Page 48: ... 48 ...
Page 49: ... 49 ...
Page 62: ... 62 Appendix 1 Screw List Torque A STANDARD SCREW TORQUE QCS ...
Page 63: ... 63 ...
Page 64: ... 64 B STANDARD SCREW TORQUE QZB QMX ...
Page 66: ... 66 ...
Page 67: ... 67 Appendix 3 I F Board Please see the next page ...