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Hello there! Got an old Philips plasma tv 42PF9945 with Samsung power supply LJ44-00049A that seems to be dead. LED's are off, there's no stdby voltage, all it's doing is a very silent sound coming from power supply board (it's not a relay clicking) as if the switching power supply was trying to start, but it's not. Any ideas? Same after disconnecting YSUS/XSUS boards. Thanks in advance /Kris

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Kris are you sure of that model number... That supply is most commonly found in a Philips 42FD9935/17 but they could have revived it for your model too I guess, neither were high-end units.
You would need several pieces of test equipment to properly check the supply and if you're not a tech I doubt you would have made such an investment. Best advice take to a qualified tech or just replace the supply. Try ModusLink, Tristate Module or Shop Jimmy for a replacement.

Posted on Jun 30, 2011

  • Anonymous Jun 30, 2011

    Hello there, thanks for your comment. Yes, I'm sure about the model number. I'm not a total newbie in terms of fixing switching PCB's, but THIS particular one seems to be way more complex than any other I've ever seen :) Usually I deal with LCD's, not plasmas. I've got some equipment to make a basic tests, the trouble is I couldn't find a schematic. I guess I'll start from changing some caps and see what happens. None of them is puffed though. Cheers

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SOURCE: Hello there! Got an old Philips plasma tv 42PF9945

U searches and look at all the capacitors components on the power supply board for dying and dead capacitors yet,these capacitors are dying or dead it is alway bulges up or puffing up on to it tops.These capacitors must be replaced if have bulges or puffing up on to it tops.If no.Power supply board have internal parts are dying and shorting out some where that why it is giving very low current to power supply board.This problems are very difficult to track it down to any perticular parts are shorting out and dying.Have to have alots tools,skills and eclectronic components thoeries to do so.Best just replaced the a whole new referbish power supply board.Try website like Ebay.com to buy one.

Posted on Jun 30, 2011

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U searches and look at all the capacitors components on the power supply board for dying and dead capacitors yet,these capacitors are dying or dead it is alway bulges up or puffing up on to it tops.These capacitors must be replaced if have bulges or puffing up on to it tops.If no.Power supply board have internal parts are dying and shorting out some where that why it is giving very low current to power supply board.This problems are very difficult to track it down to any perticular parts are shorting out and dying.Have to have alots tools,skills and eclectronic components thoeries to do so.Best just replaced the a whole new referbish power supply board.Try website like Ebay.com to buy one.

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