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Two things, First you need to replace all of the capacitors on the power supply board at the same time even if they do not show signs of failure because they have been under stress. Secondly, you need to use the correct ratings on the capacitors not just the mfd and voltage. Parts from Radio Shack and such will not work right and can cause additional damage to the power supply board. Here is a link to an article about getting the correct capacitors for LCD monitor repairs. http://www.ccl-la.com/blog/index.php/capacitors/
This is the same issue I had AND....you can fix this by replacing 5 capacitors in the screen Power Board, So here we go: go to Radio Shack or similar store that sells capacitors and buy (3) 220 Microfarad capacitors Radio Shack Part Number 272-1029 and (2) 1000 Microfarad capacitors PN 272-1032. Now on your board you will see the bulging capacitors just remove them and replace them with the new ones. PAY CLOSE ATTENTION to the polarity, there is a negative stripe on the side of the capacitor. Make sure it goes back in the way the old one came out. Now the radio shack capacitors are 35vdc and the stock capacitors are 25vdc and the new capacitors are bigger in diameter but the difference is ok as long as the Microfarads are the same. Mine were replaced and all is well now
In mine, there was a 1000 micro F capacitor in the power supply board that was damaged. You can tell which one it is by looking at their top. The bad one looks like it inflated and blew up.
I replaced it and it worked fine for 1 year so far.
The power supply is the one that is boxed in. You will need to remove the cover to acces the cap. I bought mine at Radio Shack for $1,59.
Good luck in taking it apart.
I have repair many Westinghouse monitors. You'll need a set of hardened plastic pry bars to remove the bezel. You'll need an ESR meter to test the capacitors in the power supply. You'll need an static isolated soldering iron the replace the capacitors. The capacitors you can get at a local radio shack. I do these repairs daily and they're not as hard as it seems.
There are three (3) capacitors that go bad on the power supply board. MAKE magazine's Instructable site has a good guide on replacing them. I have a june 07 and july 07 date monitors. they were different inside!! identical outside, however. The bulged,'bad' components were 1000uf 10v cap's, I put in radio shack 272-1032 1000uf 35wvdc. My monitors? BOTH were bought for $35 on craigslist, $10.35 in parts. ???BusinFLA -at- hotma*l dot com.....worked for me!
From other posts here the repair kit appears to be just the 3 caps and instructions to unsolder the 3 blown caps and replace ( solder back in) the 3 new caps. Once you get the back off the monitor and start taking it apart you will see 3 capacitors- they are labeled with 470uf25v- it is the only set of 3 caps.- in the power supply ( near where the 110 power plugs in). - Go ahead, take the monitor apart- look for the capacitors- do you see them? If it looks like unsoldering them and replacing them is something you could do- give it a shot, what have you got to loose.
to see pictures of capacitors and to find way more information than you probably want to know - check out www.badcaps.net. - bad or blown capacitors seems to be a problem with motherboards and evidently monitor power supplies also.
I ordered my caps from Mouser.com- Shipping costs about the same as a gallon of gas and I didn't have to hunt them down. I ordered their part number 647-UHE1E471MPD6.- There are lot of capacitors of this type listed and honestly I just nearly randomly picked one with the same spec and size- but a different brand since the original ones blew. These fit the existing holes on the board exactly and were the same physical size so they didn't get in the way of any other components when I reassembled the monitor.
look at the caps carefully or take a picture before you remove the old ones, to be sure you get the new ones in correctly- there is a positive and negative on them!
My monitor has been working fine since it was repaired in January- 5 months ago.
What i would suggest is taking those numbers going to your favorite search engine and entering them. Alot of times search engines can give data concerning hardware parts just by there manufacture number. This will give you a foundation to find what that particular part is and also maybe a replacement part. A word of caution about working with capacitors. Even after power has been off for several hours they can still hold a deadly charge. If you have a volt meter I would use it to test the part before even thinking about it. Capacitors are nothing to mess with unless you have proper knowlege on how to handle them and discharge them.