Question about Toshiba 50HP66 50 in. Plasma Television

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My Toshiba 50HP66 will not turn on. It powers up like it is trying to turn on, then it makes a clicking sound and turns off. It will do this over and over until I unplug it.

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  • fmvays Jun 28, 2009

    Thanks for help. I did some home work as followed:
    1.Power doesn't turn on : Is F3900 broken? - no (checked)
    2. Is there voltage at pin 11 of cp3201 5v? - yes (checked)
    3.is there voltage at pin 2 of ic3804 at 3.3v? - yes (checked)
    4. change Scaler PCB.

    This is what troubleshooting guide tells me.
    Is the scaler PCB common problem?
    Should I look for this board now?
    What is your suggestions?

    Thanks a lot.











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  • 1,077 Answers

Most TVs have a "Protection Mode" that turns the unit off when it detects a failed part inside the tv.
The most likely the tv has a power supply related problem. I can't say it's 100% the problem because I can't actually look at the tv over the internet.
If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20.

I hope I shed some light on the subject for you.

Posted on Jun 28, 2009

  • Devon Sacco
    Devon Sacco Jun 29, 2009

    yep. start looking for the Scaler PCM. The guide should identify the part for you. You should be able to find a replacement part with the part #, Just run the part# on google search and someone should sell it.

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