BenQ Q7T3-FP737S Service Manual page 54

Q7T3-FP737S Dual function LCD Monitor Service Guide
5. DVI_BD
DVI No picture or picture unstable
Power off
No
Does cable plugs in
connector?
Yes
Does power stable?
Yes
Is LED light green/orange?
Yes
Is LED status normal?
Yes
Does crystal work correctly?
Yes
Is DVI BD normally?
Yes
Replace panel
Confidential
Trouble Shooting
Yes Turn on power
No Check all of wire then turn on power
switch again.
No Check Power BD
No Check control BD
No Check MCU(U4) or replace it
No Check crystal Y2 CKT or replace it
No Replace DVI BD
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