Question about Daewoo DP42SM 42 in. HD-Ready Plasma Television

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My video board is bad

Hi. My video board is bad! found a shorted cap removed from board but dont know value! I need a video board or schematic?.Sal

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Hello mycar..the biggest problem i have found on late tvs is that you can get some service repair manuals and schematics but they do not give you anything on the major boards like the vid ..x&y boards ..logic board .i have a plasma that the vid board is faulty to and cannot get any info on it .maybe it is because they dont want to fix them..some sets are rebadged brands .try putting your model no in and see what may come up.it could possibly be lg boards in it .if so you may stand a chance..

Posted on Jun 21, 2008

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Posted on Jan 02, 2017

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Seeing as the card still works, it might be a capacitor for the clock, which means that the clock would be slower after removing it, or having it shorted, that or it's a voltage regulator cap. Well, anyway, to measure it, you could use your multimeter with some scrap wire extended from its inputs (I'm assuming here that the capacitance meter has sockets to put the leads of the cap in) to the solder joints on the other side of the video card from where the caps are mounted. Or, since you're going to (or have already) removed the cap from the board, you could just measure that one, instead of other caps, as those might not be the exact same. Also, video card manufacturers, and other manufacturers of this sort of stuff like to keep that sort of thing a secret, I'm not surprised that you couldn't find any schematics on the internet.

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I have a Panasonic TH-42PX80U TV. When I power up the set, after a few seconds you can hear the relay click and then the LED blinks 2 times in cycle. When I hold the power button for 10 seconds the LED...


Hi
A common problem for these is bad capacitors in the power supply, Remove the back from your Tv and look at the power supply on the left hand side.

You will see roughly around 9 x capacitors that are bulged / domed shaped on top usually these are valued at 3300uf 10V any that have bulged or leaked a brown like substance should be changed.
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Try and change them for the same 3300uf but a higher voltage.
Hope this helps

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1 Answer

Hi, I have a Syncmaster 931BW that has ruptured the large capacitor on the power board. It looks as if it is rated as 100uf 450v. Hard to read as it is still bonded to the board. Is this correct and do...


Not very often, it is the main DC filter caps on the primary side of the switching power supply, 100uf 450vdc is correct value. Just cut the wraper off with a razor blade then it will be easier to remove the bad caps.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

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In the CRT tube socket connected to the video board.Resolder that,changes all the caps on the video board around the main IC.That should solved the problems,not than ur main IC in the video board is shorted and dead.

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No sound, blue screen with blur of red, an green


the resistor overheated as a result of the diode or the capacitor went bad. Your gonna need to get a schematic diagram and find out what the part #s are as you cant just put in any type of diode capacitor or resistor. Also see what thay voltage source feeds and make sure nothing else is shorted.. Good Luck

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