Question about Projection Televisions

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Gateway 42" plasma TV; model #P420142V5. No picture; green power light comes on, relay clicks for power-up, then clicks again. Picture never appears. Bad power module, picture module, etc? Thanks, Alex alex.jelepis@grubb-ellis.com

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  • ajtarga Jul 12, 2008

    Thank you.

  • ajtarga Jul 12, 2008

    Still reviewing solutions for my Gateway 42" Plasma TV; power clicks "on" then "off" again quickly; no video/audio.

    Main power board and "bulb" were suggestions.

    Thanks.

    AJTARGA

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6 Answers

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May be it just some bad fuses on the power board. Look for burnt ceramic fuses and see if you can find any. Also look for bad solder joints or burnt capacitors. IF none of these work then its time to get a multimeter and check the voltages across various components on the powerboard and comparing them with the values in the service manual suggested by Darklord.

Hope this helps,
Sai.

Posted on Jul 12, 2008

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Sir,

Shop Mode is an automatic picture setting intended for retailers todemonstrate functions to customers. Shop Mode returns the picturesetting to Dynamic Mode within thirty minutes, thereby saving theretailer from having to manually reset the TV.
If you have a 2007 Samsung TV (HPT series, FPT series, LNTseries, HLT series, or TXT series) and your picture setting keepsreturning to the Dynamic mode, it probably means that your TV is set toShop Mode.
To check if your TV is in Shop Mode, press Info on your remote. If the picture mode says "Shop Mode", do the following:

  • Press either the Up Volume or Down Volume control on the TV. The Volume bar will be displayed.
  • Press and hold Menu on the TV until "Dynamic Mode" is displayed (about 7 seconds).
  • Press Info on your remote and confirm picture mode says "Picture Mode: Dynamic".
Shop mode can be enabled/disabled from the Setup Plug & Play menu and also from the service menu.

Thanks
Good luck

Don't forget to rate the solution

Posted on Jul 12, 2008

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  • Master
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Hi-

Replace the bulb- seems you have a busted bulb on your TV.

Thanks for using Fixya

Posted on Jul 12, 2008

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  • Master
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Its a Main Board problem thats causing the safty to trip, If you have eletronic skills here is the service manual and schemetics
http://www.sharefx.com/index.asp?tab=tab5

if you do not have experience in this field
WARNING THIS CONTAIN HIGH VOLTAGES WHICH CAN KILL YOU

take it to a certified technician

I

Posted on Jul 12, 2008

  • 1 more comment 
  • Rishi Roshan Ali Jul 12, 2008

    Dont forget to vote or rate the expert who helped you, or if you need further information please ask

  • Rishi Roshan Ali Jul 12, 2008

    I doubth the back light will trip the safty,, Besides it will go on and off before it actually goes..

  • Rishi Roshan Ali Jul 12, 2008

    The backlight controlls the screen to allow you to see the picture on the screen ,, it wouldnt cut the audio and surely wouldnt trip the safty as there shouldnt be any sensor of feed back from ut

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  • Master
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It depends where the line is centered most, to the right or left of the center, there are buffer boards that control the vertical video, on the bottom part of the unit if you take the back off and look at the bottom part of the set you will see these address boards, they are usually about 2 inches wide and could be labeled J or K, if the unit is High Definition then you could have these buffer boards on the top part of the unit also

Posted on Jul 12, 2008

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  • Projection T... Master
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Do you gate flash light blinking, if yes, how many times?

Posted on Jul 12, 2008

  • Ginko
    Ginko Jul 12, 2008

    You should get light flashing a certain number of times, to diagnose the problem.
    If the tv shut down immediately without returning the flashing code, then it is probably the power unit faulty (short overvoltage, burnt comp[onent etc.) causing the safety switch to turn off tv immediately.
    The tv should be tested thoroughly to find out the fault.


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