Question about Vivitek V37655 56" DLP TV

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Vivitech 56 DLP

I have a Vivitech 56 DLP TV I had the bulb replaced and now the color is gone and the picture is flickering.

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  • Anonymous Feb 25, 2009

    Dear Sir or Madam
    Please look at the video I attached to this e-mail my model number is " RP56HD21-A "
    S/N M529FMBR00139
    . After about 30 minuets it starts this colorless flashing effect.
    I called C S they could not under stand this condition. I cleaned ( vacuumed ) the interior components. It worked one night then it started again the next day.The video is in adobe photo shop album starter edition 3.2 The T V is 2 years old none of the LED lights flash the codes while this is happening .the lamp is 1 year old and work fine. I found two fans, one for the lamp and one for the heat sink in the picture generator
    component. can you tell me what you think is wrong.
    thank you

  • Anonymous Mar 06, 2009

    may tv flash every second

    my tv flash every second and then go 0ff



  • Jack Richard May 19, 2009

    I have a very similiar problem and Vivitek is no help what have you done with your tv.

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I had a similar problem.
My TV started to flicker and I put a new bulb in. The new bulb did not help, even if ot is good to replace after a couple thousand hours.

I found out that mu heat sink, which is sitting on the CPU with the mirrors came loose and the unit overheated and shut off after flickering a while.

Try to take the lower back panel off and you see a heat sink which is sitting in the center of a aluminum sheet metal piece. Disconnect the wires which are attached to the circuit board behind the sheet metal. Then take off the screws holding the sheet metal and pull it gently off. It will take a little force, but it does not damage anything.
Now you see the heat sink on the circuit board heald by a latch going across the heat sink.
On the upper right corner you will find the handle to open the latch. Once you did it, you can take the heat sink off and see the main CPU (as I took the latch off, my heat sink fell off).
On my heat sink the Heat Sink Compound Paste creating the connection between the CPU and the heat sink dried out and became brittel, so there was no connection anymore and the couldn't be transported out through the heat sink, which is cooled by the fan sitting on the left.

I took the brittel Heat Sink Compound Paste off and applied a generous portion of the one that I bought at Radio Shack. I used Silicone-Base Heat Sink Compound which ran $4.99 excl. tax.

After applying the paste put the heat sink gently in and when you do, you will feel like a suction indicating that you have a connection between the CPU and the heat sink.
Now you need to put all parts back together.

If you are not familiar with electronics and those wires it wouldn't hurt or would be wise to mark the connectors and make pictures before removing them. This will save you a lot of frustration.

I hope this helps you and brings your TV back to live. My TV was cutting out after 25 minutes and runs now like a charme.

Good luck.

PS: If you experience a black screen with vertical stripes (mine were white and green) then most likely the light engine needs to be replaced, I had this after 9 months and got this fixed under warranty.

Posted on Jul 04, 2009

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Hi I had same prob. after trying a bunch of things we took off the back of the tv and lightly sprayed can air into the color wheel area ( where the bulb faces) I used the long stick for the air can and put it near (not in ) the silver holes. I saw a piece of dust come out and tv is now fine. I think something gets in and blocks the color. I figured it out when I turned on tv ( after problems) and was trying to see if the lamp was going to blow (dumb yes) but when the tv light on the screen lit up (the one that tells you what channel you are on etc...) it went blue, it had always been green. That is why I thought the color area and sure enough!! I am elated to have fixed it. Hope it helps. Be careful though barely push the spray. The dust flew downward so maybe you could tilt can that way before you spray.

Posted on Mar 05, 2009

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zimmer3,

It sounds like you have a bad color wheel. It is not running the proper speed and causing the flickering. Usually you hear a humming sound also but not always.

I have a tip at http://www.fixya.com/support/r4160054-replace_color_wheel_in_dlp_projection_tv which explains how to change the color wheel and where to get the parts at the best price.

Thanks for using FixYa and for the great rating.

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2
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