Westinghouse LCD Repair

After seeing the repair I made on the Samsung LCD monitor, a friend gave me a few-years-old Westinghouse LCD/TV that had quit working – it wouldn’t power on anymore. It’s a Westinghouse SK-19H210S, 19″ LCD accepting VGA or HDMI up to 1440×900 resolution (somewhat smaller than true 1080P) and can also tune ATSC and NTSC television signals to receive HDTV over the air.

It’s apparently a very known fact this one has a weak power supply – all over the web. I opened it up and grabbed the power board:

Tucked away all in the back is one capacitor that’s visibly failed, which means it’s likely several are bad or will be soon.

New parts arrived from Mouser.com:

Using my trusty Hakko, I replaced six capacitors. 4 caps in total showed signs of leaking from the bottom as well (discolored board below), 2 seemed okay but I replaced anyway because why not. I’m getting better at using the Hakko and doing this kind of PCB rework in general, the entire process from start to finish only took about 15 minutes this time.

100uF 400V
2200uF 10V
1000uF 10V
1000uF 25V x 2
47uF 50V

Interestingly (or maybe not), these bad caps were the same brand as the bad caps from the Samsung: CapXon. Obviously those have reliability problems, or are just the cheapest they could buy.

Reassembled and powered on. The first power-up would come online but drop off immediately and it was making a hissing noise; it turns out I hadn’t firmly connected the backlight leads. After fixing that, I snapped everything back into place. Consumer electronics these days aren’t made to be opened up, so the case doesn’t quite fit back together the way I’d like it to around the control panel on the side, but it’s not visible unless you look for it fortunately.

Another one fixed! This one was about $12 of parts. Looks like this one goes for around $80 these days, so I’m half-way to getting my money’s worth out of that rework station already.

My next TV repair will be somewhat more ambitious. I got this Samsung HL-P4663W, a 46″ DLP (720p) HDTV for free from Craigslist. It needs a new bulb, and some other rework, and it’ll be worth a few hundred dollars after I get it sorted. I don’t intend to keep this one (as I already have a 46″  Samsung LCD that does full HD resolution) but just to repair and sell most likely.

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6 Responses to Westinghouse LCD Repair

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  3. Tom Guyette says:

    I would like to repair a SK-19H210S that I got at savers for $7.00 The power does not come on. I cannot figure out how to get the back off. Could you let me know how to remove the back? I took out the 4 screws but would like some hints. Thanks

  4. Sean says:

    Thanks, today I switched out the AMwatt meter(original readings) and tried a KillAwatt and measured 41.9W@120vac power on and 12.5W@120vac off I am going to try some other readings to confirm. I will post my findings.
    Thanks
    Again
    Sean

  5. jwk says:

    Hi Sean, 44W@120V AC seems a bit high for it to be off while powered down. Sounds like you have a shorted filter cap that’s drawing some amount of current constantly. When mine was bad, it shut down and turned off entirely nearly instantly. It sounds like you’re going to want to replace the caps in yours.

  6. Sean says:

    I repaired one also, not a bad TV except for the supply issue.
    Does the one you have or had when shut, down does the blue Led go out and not change to another color (hdmi mode)?
    Mine measures when powered down 44 watts@120vac is this normal ?
    Thanks

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