Question about Mitsubishi VS-5043 50" Rear Projection Television

Mitsubishi vs-5041 picture intermittently goes off

My big screen's picture will be normal, then some lines will appear horizontal in random sequence for a second or so then picture goes off on all inputs. It may reappear for minutes, hours,???. The dvd input will light up blue. the picture may work for hours or days, but becoming worse at going off. I have a masters electrician license, but I am not a tv repairman. Can anyone help?

1 more comment
catTracker Dec 15, 2007

I don't know where the convergance ic is located. I have had the front and back off. Cleaned and checked connections.If you bump the front panel at the display light (next to the power button the picture will come back momentarily. I have checked all the connections to front panel. The problem has gotten worse. Picture will come on every time you turn the tv on then go to horizontal lines running in all kinds of directions then go dark.
catTracker Dec 16, 2007

Yes, I've soldered many times. I'll look at it again and try and locate the convergence ICs. Do you know how many there are?... just one? I'll check all boards for bad solder joints. Thanks for your help!
clindell Nov 17, 2008

i can kick the bottomand the picture will come back for a while like something is loose

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Master
4,402 Answers

My guess is convergance ic but to troubleshoot it the best soultion might be to get a can of freeze and spay it on the IC while the problem is happening and or tap the board/ic's to see if you have a loose connection,

Posted on Dec 14, 2007

Anonymous Dec 15, 2007

sounds like you have a loose connection then, are you any good with soldering? or know anyone that is?
the convergence ic's have a stk392??? on them, best thing to do is keep the unit off til it's fixed
check the underside of the board and check for bad solder joints or discolored solder, i would touch up all of the connections on the convergence ic for sure

if you dont know how do it you can send it to www.ptscorp.com
becarefull theres high voltage in that there box.
Anonymous Dec 17, 2007

there is at least 2 on some set there are three, it has a large heat sink (silver in color) attached to it

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