Trouble Shooting; Interface Board - BenQ Q7T3-FP737S Service Manual

Q7T3-FP737S Dual function LCD Monitor Service Guide
Q7T3_LS(FP731-DVI) TROUBLE SHOOTING GUIDE
No Display or display is unstable:

1.1 Interface Board:

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 interface 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 interface BD
1