tv repair shop software

Software for repair shop
Assist Control

Free trial

tv repair

 Monitor repair forum - Open   
Download schematics and service manuals
See our courses below


  << Previous Topic | Next Topic >>Go to monitor repair course  

benq fp91g+ (q9t4) monitor not turn on

April 16 2013 at 1:53 PM
No score for this post
paul  (Login paulmarsx2)

benq fp91g+ (q9t4) monitor. Mostly wont turn on. Once in awhile it does and works fine. However, that's very seldom. The on off switch hot side is 3.3vdc. The switch grounds that when its pressed and my dvm then reads 0vdc. Every time. Ive traced it to the display circuit board plug,
gray wire. So, it goes from 3.3vdc to 0vdc when the switch is pressed - Every time. Over and over I can do this and every once in awhile, the unit powers up and it works fine. however, the next time, it wont power up.

Any ideas what could be wrong? All the caps look fine. Ive also inspected all solder joints.


PS note that I registered and it said wrong when I try log in, and lost pswd said my email not there, so i had to register a 2nd time. please fix site.

Scoring disabled. You must be logged in to score posts.Respond to this message   
  << Previous Topic | Next Topic >>Go to monitor repair course  
Find more forums on SchoolsCreate your own forum at Network54
 Copyright © 1999-2017 Network54. All rights reserved.   Terms of Use   Privacy Statement  
   TV repair course   TV repair forum     Monitor repair forum    Monitor repair course