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Re: Sylvania SRPD442 no picture
Your problem is probably in the power supply as theres a voltage called the sustain voltage that is always keeping the screen charged so the address lines will activate the screen and make it light up Via the Microprocessor and the video processor. This is not a repair for a handy person as this set, you can cause more problems Please seek out a trained tech for this set. Good luck
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Before taking this to a local repair person, I suggest you check with your cable provider. See if they are having trouble with their HD transmission and then have them test your lines. Out here in Arizona with have constant problems with HD due to heat, rodents and poor installations. Your DVR only recorded the problems that were on your set. If these prove fruitless then take the TV to a reputable repair person.
If the line is vertical in nature then most likely then the plasma display panel is bad and won't be worth fixing because of cost. If the line is horizontal then the issue might be a lower or upper Y-buffer module.
This can be many types of faults. The set will need shop service. There may be cold solder connections on one or some of the boards, or there may be come components that are intermittant. In anycase most of the time, there will be the need for board replacments.
The cost for this type of repair can be fairly expensive. I would consider investing in to a new set because after having this serviced, there will still be many older components in the set that can potentialy fail.
This could be anything but is more than likely a problem in the power supply or control board. There really are not any user serviceable parts in these units and they have dangerous voltages. Repair is best left to a professional.