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TV repair

Old 02-11-2019, 12:11 PM
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TV repair

Well, I inherited a broken tv last week. It's the same as mine so my buddy gave it to me to try and fix it. I opened it up and found 3 capacitors popped. Same as what happened to mine, so I ordered all of the capacitors 15 total and got to put them in today (just another hat I have) Well, good news bad news, TV comes on and then shuts off, and then restarts and then shuts down again, an endless cycle. Then for some reason I put the mute button on, well guess what, the picture stays on, beautiful picture, but of course no sound. As soon as I turn off the mute I get sound for about a minute then it starts all over again with the off on off on
Damn, I hate when that happens, I thought I could get a free TV.................
Don't know if anybody here has experience with this but all help welcomed.
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Old 02-11-2019, 06:31 PM
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Usually it is the electrolytic capacitors that fail in these TVs.

You made some progress!

Did you make sure the polarity on all the capacitors were installed in the correct orientation?

Do any of the solder joints look cracked? Any lifted pads on the circuit board?

Are there any connectors not connected all the way?

I have no experience with fixing modern TVs. I actually have one from my parents that would turn the screen on, but the screen starts with many tiny color bars and slowly washes out to white over 30 minutes time. If you were lucky, the TV would work normally after this. I have no idea what causes that to happen....

That TV is one of my "when I have a free weekend" projects.

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Old 02-12-2019, 08:14 AM
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Hey Jake,
Well I do have some experience, I used to build amps and tuners back in the day.
I did replace them correctly and checked the entire power board for any problems. I'm thinking it's the main board and not the power board. The set will stay on for hours in mute, but as soon as I take it off mute it shuts down. I even unplugged the speakers and that didn't work either. I also went and disabled them in the setup and that didn't work either. So I'm going to take out the main board a give a once over, no caps on that board so I'll just be looking for loose or burnt parts.
It's just something to do when it's 10-20 degrees outside
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Old 02-15-2019, 09:37 AM
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Well, TV fixed
Seems it was something with the main board, after I changed out all the capacitors in the power board it still didn't work so I was able to buy a main board. Put it in and now it works as it should.
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Old 02-15-2019, 10:06 AM
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Nice!

Now you can spend all day watching The Shopping Network!

Only kidding!

I am glad you got the TV working again!

Maybe one or more of the old capacitors took out other components on the main board while it was failing. That is a definite possibility.

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Old 02-15-2019, 11:18 AM
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Originally Posted by old87yota View Post
Nice!

Now you can spend all day watching The Shopping Network!

Only kidding!

I am glad you got the TV working again!

Maybe one or more of the old capacitors took out other components on the main board while it was failing. That is a definite possibility.

Shopping network......really.....LOL
Yeah, that's what I'm thinking, maybe it blew something in the main board.
Now that it's fixed I put in a box and put it in the closet, don't really need another TV. I'll use it as a spare, I have the same one hanging in my living room, if mine takes a dump I have a replacement
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