Fix for the Vizio VW26L power supply good but tv unresponsive

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  • slimbobaggins
    New Member
    • Feb 2012
    • 6

    #1

    Fix for the Vizio VW26L power supply good but tv unresponsive

    Hey guys,

    Over the last few weeks, I've started buying broke LCD's off craigslist and fixing them to resell. As a result I found this forum, and have been lurking, getting tidbits of info from the different threads.

    Well, I wanted to give back a little.

    I recently picked up a Vizio VW26L...I don't know the history of the tv, as the guy I bought it off wasn't the original owner, he bought it to broke himself intending to fix it... sympton was the tv was completely unresponsive when plugged in, not even standby lights.

    I opened the TV up, the main AC fuse was blown, so I replaced that. Once the fuse was replaced, I had the 5V standby, but curiously I was also reading the 15V and 24V as hot at all times. Still no standby lights, and pushing the power button had no effect.

    Long story short, it looks as though the heat sink to the processor on the main board must have been shorting out a couple pins, causing the tv to be unresponsive.

    I had removed all the boards, inspecting for damage, and had removed the heatsink to inspect the processor. Finding nothing, I reassembled the tv and was shocked when I plugged it in and it came to life.

    Thinking that there had been a loose pin somewhere that I had reseated when I reassembled the tv, I slapped the heatsink on with some artic silver and high temp rtv, and was disappointed when plugging in to see that the tv had gone back to its previous unresponsive self.

    Realizing that the only thing that had changed was the heat sink, I inspected it, and sure enough, some Artic Silver had blobbed onto a couple pins. I cleaned it off with a Q tip and alcohol, and the TV is back to working fine. The heat sink had previously been held on with an adhesive pad, so I'm not sure how it had shorted the pins, but the heatsink is so large that it's right at the edges of the chip. I'm going to pull it back off and put a bevel on the edges to make sure that it doesn't touch or blob out the artic silver again.

    Hope this helps someone else out. I'll be around on the forums every now and then, as I just picked up a 44 inch the other day for $25, and will keep trying to do this just to make some extra cash.

    -Jim
  • slimbobaggins
    New Member
    • Feb 2012
    • 6

    #2
    Re: Fix for the Vizio VW26L power supply good but tv unresponsive

    Well, I haven't pulled the heatsink back off to modify it yet, but I've been using the TV to test it out, and it's started having an issue with horizontal lines and the image not being correct... the image will move up or down or become "smushed." I don't know if this is due to the processor/heatsink issue, or another problem that needs diagnosed. I won't have time until later this week to modify the heatsink and seal it all up, so I'll report back then.

    Comment

    • southboundsuarez
      New Member
      • Oct 2012
      • 3
      • usa

      #3
      Re: Fix for the Vizio VW26L power supply good but tv unresponsive

      And ???? What did ya find out? I also have a troubled vw26l.

      Comment

      • slimbobaggins
        New Member
        • Feb 2012
        • 6

        #4
        Re: Fix for the Vizio VW26L power supply good but tv unresponsive

        Sorry, just seeing this now years later. I ended up replacing the main board of the tv.

        Comment

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