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BenQ Q7T3 Series Troubleshooting Manual

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Q7T3(CPT panel) LCD Monitor Service Guide
1.No Display or display is unstable
Q7T3-CPT 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
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

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Summary of Contents for BenQ Q7T3 Series

  • Page 1: Trouble Shooting

    Q7T3(CPT panel) LCD Monitor Service Guide Trouble Shooting Q7T3-CPT TROUBLE SHOOTING GUIDE 1.No Display or display is unstable No picture or picture unstable Power off Turn on power Does cable plugs in Check all of wire then turn on power connector? switch again.

  • Page 2: Button Function

    Q7T3(CPT panel) LCD Monitor Service Guide Trouble Shooting 2. BUTTON function: OSD is not working Is control BD connecting? Plug control BD then retry Is bottom switch normally? Replace control BD then retry Replace Control BD Is OSD working?? Check Interface BD 3.

  • Page 3: Power Board

    Q7T3(CPT panel) LCD Monitor Service Guide Trouble Shooting 4. Power Board Backlight didn't shine Replace Q761 IC751 PIN 9 IS 15V? LED shined? Plug CN701 again or PWM existed? 3.3V existed? IS I/F board connected? checking I/F BD (BLT_ADJ) Replace new fuse Plug CN601 again or Turn on level existed? checking PW BD...