electronics, repairs, service manuals and datasheets discussion community for the repairs professionals and technicians
FAQSearchMembersGroupsRegisterProfilePM'sLogin/Out
Samsung LCD Monitor 940N Backlite problem

 
Post new topic   Reply to topic    Electronic equipment repair and service manual search discussion Forum Index -> Computer and office equipment repairs
View previous topic :: View next topic  
Author Message
Dejan71
Guest





PostPosted: Wed Jun 02, 2010 11:50 am    Post subject: Samsung LCD Monitor 940N Backlite problem Reply with quote

I have problem with Samsung 940N LCD Monitor. When I turn on standby switch, everything work fine for 2-3 seconds, and than backlite turns off. On lcd panel I can see that picture appear but with no backlite. I checked capacitors on power supply board, thay were in bad condition, and I changed them. But this didn't fix a problem. I started to think that maybe one of 4 laps are defectiove, and that is the reaseon for inverter overload. If someone have experience on that kind of problem, please reply to my post.
Back to top
jts1957



Joined: 24 Nov 2008
Posts: 2472
Location: Far, Far Away

PostPosted: Wed Jun 02, 2010 1:54 pm    Post subject: Reply with quote

My next troubleshooting step would be to plug in a set of known-good lamps (take out of a busted TFT screen). If they come on and stay on - panel has one (or more) lamps bad (unplugging one known-good bulb and trying original lamps one at a time will point out which one(s)). Or conversely power the lamps in your monitor with a test fixture. I made mine from another junk monitor chassis (Samsung 740N).

You also just could unplug ALL bulbs. Plug in one at a time (each in its own turn) and see if each lights up THE SAME just for an instant. If one bulb lights more dimly (or not at all) you know it is suspect. Cool
_________________
You're over there, I'm over here.
Back to top
View user's profile Send private message
Justmanuals



Joined: 21 Aug 2004
Posts: 1949

PostPosted: Wed Jun 02, 2010 7:30 pm    Post subject: Reply with quote

This Parts & Service manual can now be purchased for $10.77 and downloaded immediately after payment from http://www.justmanuals.com


[email protected]
_________________
Want To Fix Something?
http://www.manuals4you.com

Need a manual now? Instant Download
http://www.justmanuals.com
Back to top
View user's profile Send private message Send e-mail
jts1957



Joined: 24 Nov 2008
Posts: 2472
Location: Far, Far Away

PostPosted: Thu Jun 03, 2010 1:32 am    Post subject: Reply with quote

http://elektrotanya.com/?q=showresult&megnev=samsung&megnev2=940N&kategoria=&kat2=schematics
_________________
You're over there, I'm over here.
Back to top
View user's profile Send private message
Justmanuals



Joined: 21 Aug 2004
Posts: 1949

PostPosted: Mon Jun 21, 2010 4:53 pm    Post subject: Reply with quote

The above link is only for the schematics. What I have is the full service manual including the parts lists and the schematics.
_________________
Want To Fix Something?
http://www.manuals4you.com

Need a manual now? Instant Download
http://www.justmanuals.com
Back to top
View user's profile Send private message Send e-mail
jts1957



Joined: 24 Nov 2008
Posts: 2472
Location: Far, Far Away

PostPosted: Mon Jun 21, 2010 8:32 pm    Post subject: Reply with quote

Could be all they need is the schematics. Cool
_________________
You're over there, I'm over here.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Electronic equipment repair and service manual search discussion Forum Index -> Computer and office equipment repairs All times are GMT
Page 1 of 1

 
Jump to:  
You can post new topics in this forum
You can reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Електроника София - Service Manuals Free Download - Prikachi - Service Diagrams

Free TV Schematics Download - HARDW.net - Pinout Master - Jabse Search - Jabse.InK  - Pulsator

Connector Pinout Forum - Новини - SnimkiOt.com - безплатен DNS - Whois разузнаване - Poblizo.com : пътешествия