electronics, repairs, service manuals and datasheets discussion community for the repairs professionals and technicians
FAQSearchMembersGroupsRegisterProfilePM'sLogin/Out
Need help with LG 42PC3DVA-UD
Goto page 1, 2  Next
 
Post new topic   Reply to topic    Electronic equipment repair and service manual search discussion Forum Index -> Equipment Repairs
View previous topic :: View next topic  
Author Message
techboy1000



Joined: 07 Sep 2010
Posts: 11

PostPosted: Tue Sep 07, 2010 7:54 pm    Post subject: Need help with LG 42PC3DVA-UD Reply with quote

I have the above model and it has sound but absolutely no picture. Has anyone encountered this problem and how did you fix it?

If I could get an idea where I should be focusing my attention, it would save me a lot of time. Thanks.
Back to top
View user's profile Send private message
Justmanuals



Joined: 21 Aug 2004
Posts: 1949

PostPosted: Tue Sep 07, 2010 11:15 pm    Post subject: Reply with quote

This Parts & Service manual can now be purchased for $11.77 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
minnie



Joined: 18 Aug 2005
Posts: 2877
Location: Hell

PostPosted: Wed Sep 08, 2010 3:24 am    Post subject: Reply with quote

No smeared video or nothing? Does the panel light when you turn it on?
Back to top
View user's profile Send private message Send e-mail
techboy1000



Joined: 07 Sep 2010
Posts: 11

PostPosted: Wed Sep 08, 2010 4:21 pm    Post subject: Reply with quote

minnie wrote:
No smeared video or nothing? Does the panel light when you turn it on?


No. Nothing. The screen remains the same when I power up as it is when I turn it off. As for the panel, if you mean the light to indicate that the power is on, yes. It is red when off and turns green when I turn the set on.
Back to top
View user's profile Send private message
minnie



Joined: 18 Aug 2005
Posts: 2877
Location: Hell

PostPosted: Wed Sep 08, 2010 11:14 pm    Post subject: Reply with quote

Did you check the caps on the power supply? Check the VS and VA voltage?
Back to top
View user's profile Send private message Send e-mail
techboy1000



Joined: 07 Sep 2010
Posts: 11

PostPosted: Thu Sep 09, 2010 2:58 am    Post subject: Reply with quote

minnie wrote:
Did you check the caps on the power supply? Check the VS and VA voltage?


I looked over the circuit boards for obvious damage and found nothing. However, I checked all the ceramic fuses I could find and one 4A-250V fuse on the YSUS board was open. Trouble is, I don't know if it blew because it may have been weak or if something caused it to blow.

All I did for caps check was inspect for bulging tops. I know that's not very reliable, but the caps on the power supply look fine. If anything, those on the YSUS board do look slightly bulged in comparison, but I'd have to remove it to test them and that will be a job in itself.
Back to top
View user's profile Send private message
minnie



Joined: 18 Aug 2005
Posts: 2877
Location: Hell

PostPosted: Thu Sep 09, 2010 3:12 am    Post subject: Reply with quote

Y sustain blow all the time... There should be a part number on the board.
Back to top
View user's profile Send private message Send e-mail
techboy1000



Joined: 07 Sep 2010
Posts: 11

PostPosted: Thu Sep 09, 2010 7:03 am    Post subject: Reply with quote

minnie wrote:
Y sustain blow all the time... There should be a part number on the board.


Do you mean a part number for the whole board? Are you suggesting replacing the whole board?
Back to top
View user's profile Send private message
minnie



Joined: 18 Aug 2005
Posts: 2877
Location: Hell

PostPosted: Thu Sep 09, 2010 10:13 pm    Post subject: Reply with quote

techboy1000 wrote:
minnie wrote:
Y sustain blow all the time... There should be a part number on the board.


Do you mean a part number for the whole board? Are you suggesting replacing the whole board?


Welcome to my world. Yes the whole board.
Back to top
View user's profile Send private message Send e-mail
techboy1000



Joined: 07 Sep 2010
Posts: 11

PostPosted: Thu Sep 09, 2010 11:17 pm    Post subject: Reply with quote

Found the part number. It's 6871QYH048B. Now what? How much does it cost to replace one of these boards? Hope you have a good source where I can buy one. lol
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 -> Equipment Repairs All times are GMT
Goto page 1, 2  Next
Page 1 of 2

 
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