Hey All,
I'm working on my 3rd Magnavox that had power up issues that I had fixed with the help of the forum. Thanks guys!!!
This last one powers up now and have a good picture. Everything works well but it will randomly click off for 5-6 seconds and then power right back up on it's own. With a cold TV it will go for at least half an hour to 45 minutes maybe longer before this problem happens and it may happen every 5 minutes or every 20 minutes. It happens with the cable 75ohm, HDMI, composite, and Component inputs. It seems to be a heat issue. I have isolated the problem to the main board/scaler board. I had moved this board to my other two sets and the problem follows the board. The board does not have any apparent damage to any of the caps and I have tested them and they read fine on my digital volt meter. I know that I cannot truely test them because my meter does not have capacitance testing so I swaped them out with new 1000uf 25v capacitors and the problem persists. I have also cleaned the board and heat sink and applied new thermal compound as well.
What other parts would any of you suggest I check? I have found a few other boards out there for between $40 and $120...wonder if I'd be best served to just get a known good one but where is the fun in that? lol
Thanks!!!
I'm working on my 3rd Magnavox that had power up issues that I had fixed with the help of the forum. Thanks guys!!!
This last one powers up now and have a good picture. Everything works well but it will randomly click off for 5-6 seconds and then power right back up on it's own. With a cold TV it will go for at least half an hour to 45 minutes maybe longer before this problem happens and it may happen every 5 minutes or every 20 minutes. It happens with the cable 75ohm, HDMI, composite, and Component inputs. It seems to be a heat issue. I have isolated the problem to the main board/scaler board. I had moved this board to my other two sets and the problem follows the board. The board does not have any apparent damage to any of the caps and I have tested them and they read fine on my digital volt meter. I know that I cannot truely test them because my meter does not have capacitance testing so I swaped them out with new 1000uf 25v capacitors and the problem persists. I have also cleaned the board and heat sink and applied new thermal compound as well.
What other parts would any of you suggest I check? I have found a few other boards out there for between $40 and $120...wonder if I'd be best served to just get a known good one but where is the fun in that? lol
Thanks!!!
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