Hi, I've been reading your post and you make good sense. I wonder if you can help.
My problem started with a 3rd of the screen going black. Then I heard a snap and no pic or sound. The green light is on in the back and the blue light comes on by the manual buttons. I took it to a repair place and they went to replace the main board, then then found a bad Y board. They said we can keep going on replacing parts but it will be too expensive. They took out the new main and put back in the old. What do I do and where do I start. I see a few of these boaqrds on eBay, I figure I can replace a few and see what happens, but I'll need your guidence.Is there a tech sight on Dell for trouble shooting. Please Help me. Thanks!
I have solution for common problem with Dell W4201C. There are two Y Buffer boards that are failing and could show problem as bunch of horizontal lines or even dead set.
I do have boards in stock. If you need them, please contact me at firstname.lastname@example.org
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the problem can be traced from the power bd. you will need a digital volt meter. There are settings located on a sticker located on the upper right corner Va,Vset,Ve, Vset etc..... each one has a DC voltage. compare the voltages to trace the source. My suggestion from experience is the Y Main upper or lower buffer which ever has a brn mark located on the metal of the panel. Google a local dell dealorship or a repair company in ur local area, and get serviced.
I am an actual Dell repair tech for a non-Dell refurbishing company. I fix this model exact model, as well as all the other plasma TV's that Dell has come out with. If you are looking for a replacement part I suggest starting with either the power supply. But if you are electronicly inclined, I suggest taking voltage measurements across the labeled parts on the power supply that are the following: VS, VSCAN, VSET, VE, and VA. These correct voltage measurements are labled on a sticker in the top right corner of the TV. If they all come out right then your best bet would be the Y-main board with both upper and lower buffers. They are the circuit boards on the left hand side of the TV. As far as getting the parts, thats a whole other story but I hope this helps to narrow down your parts search.