Question about Televison & Video
This is a 2001 model and uses a single STK-393-110 convergence IC----Two possible reasons for problem--
1) There is a plug near the front of the board on the far left(as you look at the set from the back) If this is the set I think it is some develop bad connections on the printed circuit board under that plug--usually the blue may from time to time be good and then bad.
2.) If you see a very large metal heat sink with fins on the far left side of the set-----the convergence chip is there---if this is your set you would have to unsolder the chip and another small chip behind to the left of to get the heat sink out to replace.
3) If you can unbolt the chassis enough to tilt it up so the bottom of all the boards faces the back of the set---I did one of these recently with this exact problem.
4.) If you get the chassis up look for a plug near the front of the board with 10 or more pins---the one I fixed had 2 or 3 pins broken loose from heat from the board----resoldered all of them and problem fixed--This customer wanted me to replace the IC which I did---it was original and this is not the most easy set to replace that part in.
5.) The plug goes to the convergence yokes and usually one of first 3 or 4 pins are broken loose from the board, If the plug connections are not your problem you will have to consider replacing the chip to correct this problem---I have seen at least 4 of these sets where the connections on that plug caused the problem---good idea if it is -----resolder all the pins on the plug and look at a few other plugs to the right of it also.
6.) Let me know if you find the bad connections and remember I am here to help people---If you need any further help or have any questions let me know by replying here to this posting.
Posted on Sep 24, 2009
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Posted on Jan 02, 2017
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