Tuesday, July 17, 2012

Repairing an Under-Cabinet TV

After a thunder storm that briefly knocked out the power I found that the TV we have in our kitchen would not turn on. When the power button was pressed it seemed to power up for a short time then immediately turn off. I had seen similar behavior to this before on other devices with damaged power supplies so I figured why not take it apart and see if there was anything obviously damaged that could be replaced.

I got out a screw driver and opened up the case. The brown power supply board was easy to get to and check out. It's kind of difficult to see in the picture, but I immediately noticed a suspect capacitor with a bent up top. I plugged the TV up and turned it on and sure enough I noticed a high pitched hiss coming from around the capacitor.
At this point I was fairly certain that capacitor was the problem. Still, I decided to remove the board and give it a proper going over.
I managed to find some interesting "manufacturing techniques" we'll call them, but nothing that would inhibit the TV's function.
Since I had a spare capacitor of the same value conveniently lying around, I decided to go ahead and replace the one I suspected of being damaged. With a little solder wick I managed to remove the faulty component and replace it with a nice new blue capacitor.
 After placing the power board back in the case I plugged the TV into the outlet and pressed the power button and sure enough it was working again! All that trouble from such a small component...

1 comment:

  1. The storm made me confuse that it broke my TV,too. It's better if I can fix it myself.