Question about Apex Digital GB51HD09 51" Rear Projection Television

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Apex G51HD09 TV will not turn on. Constant humming from transformer on power bard. Where can i find a new board?

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Re: Apex G51HD09

You can try and see if will repair the board.

Posted on Jan 09, 2008

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Hi Eric,

First of all, thank you for contacting regarding on your TV problem.

I've suspected a convergence chips failure not the power supply board issue in this kind of symptoms. To confirm it, locate the convergence board inside the set, it has a Sanyo convergence chip STK392-110 that are mounted on the large heat sink. This board has a LED (light emitting diode) that will light up once the board gone to malfunction. Turn on the unit and then check if the LED will lit after the shuts down. If yes, then I would advice you to replaced both convergence Chips and check the resistance of the resistors in line with the +25V and -20V supply of the chips.
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Have a nice day!

Goodluck and take care!

Kind Regards,


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