Question about Akai PT4799HD Rear Projection Television

1 Answer

TV won't come on!

Someone else posted this exact same problem with no solution. The red led light blinks, as if the TV is going to come on. It then stops and there is no picture or sound. When I hit the power button a 2nd time, I hear a faint click. When I hit the power button a 3rd time, the red led light blinks but the TV doesn't turn on. Any advice would be appreciated.

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Most likely, this is a problem with the convergence board. The convergence amps (STK392-040 x 2)are internally shorted. These can be replaced or the whole convergence board can be replaced. It's cheaper to replace the amps, but more convienent to replace the board (especially for the less electronically inclined!! :) Also, this could be from a leaking CRT. In CRT projection televisions, the red, green, and blue tube are filled with coolent (glycol). These 42" models are very bad about the tubes leaking (Akai and Samsung models)and are infamous for destroying the CRT driver board connected to the bottom of each tube. When this happens, the protection circuit kicks in and will not let the television start up. *PLEASE, FOR YOUR OWN SAKE, DO NOT FOLLOW THESE NEXT STEPS IF YOU HAVE NO UNDERSTANDING OF ELECTRONIC EQUIPMENT!!!! There are four screws and three snap clips that hold the bottom on. UNPLUG THE TELEVISION, remove the screws and pull bottom outward to remove. The bottoms of the three tubes should be visible. DON'T TOUCH THEM!! Now look under each tube. If one is leaking, there will be a wet spot (or sometimes a puddle!) underneath the tube. This will have to be serviced by a TV tech. Hope this helps...

Posted on Oct 06, 2007

  • Jerry Coleman
    Jerry Coleman Oct 09, 2007

    Actually, on this model, I may be wrong. It may not be a convergence problem. Also the convergence amps are located on the power/deflection board. Sorry for the model mix-up....

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