Q7T4 Trouble Shooting Guide; No Display Or Display Is Unstable; Interface Board - BenQ Q7T4-FP71G Service Manual

Q7T4-FP71G LCD Monitor Service Guide

No Display or display is unstable:

1.1

Interface Board:

Q7T4 TROUBLE SHOOTING GUIDE

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
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 Flash Rom or replace it
No Check crystal CKT or replace it
No Replace interface BD
Trouble Shooting
1