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Screen flashes several times before picture comes on. Sound OK.

Sanyo DP 42647 sound comes on. Screen flashes quickly, then slowly the picture comes in. What is the possible problem, and approximately how much to fix it?

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  • 253 Answers

Sounds like your bulb may be flickering at start similar to a flourescent, do a search on google for bulb+your model, and you should see plenty of sites to compare prices.
Hope this helps, please give a good rating

Posted on May 12, 2009

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This is an LCD tv . Toshiba 40xv648u .Audio is good screen is dark. was taking longer and longer to come on.


Since the picture died slowly i suspect a capacitor on the powersupply board,if the screen flashes then goes black and sound is ok
could be the inverter board that drives the lamps.

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first just for trying--unplug set for a few minutes and plug it back to see if it resets.

If not someone will have to open set and check voltages on Power board to see if there or not.

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Dear Support, This is about a 42'' Sanyo plasma HDTV model no: DP42746. It's my mom's, and at ''84'' it's her window to the world. So it needs to get fixed, please help! It was working fine, then all...


Hi Ed,

The only thing you can try is leaving the TV unplugged for an hour so the TV can discharge and reset itself.

If this doesn't work, then we're talking about maybe a power supply board problem for the screen itself. Most manufactures call it a Blacklight Inverter Board. I would use the warranty for the TV if there is any. The TV repair shop maybe expensive for this type of repair. So, get a price quote first. That way you can decide if is easier and cheaper to buy a new TV for her.

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well how did you understand that its IR problem.? if you feel like that get it repaired as your tv is in warranty.

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This should be a quick fix. Try resoldering the vertical IC. This is a small flat IC attached to a heat sink with about 11 pins. It should be marked LA7837 or something similar. That should resolve the problem.

Keep us posted.
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