Dell W4200HD No power

[Uranium-235]

I've been looking around on the web and have not found many information on what you get if the power board has no power diagnostic LED's lit. I already tested the input from the plug going right into the and its ok

the final stage main caps metal looks flat and intact even though the plastic cover looked bloated

but that wouldn't be the problem right, since no diagnostic LED's are lit to get to the final stage

also tested all fuses and all are good

[dick_barton]

Re: Dell W4200HD No power

Better to post a photo's of the boards.
"The final stage main caps metal looks flat and intact even though the plastic cover looked bloated"..... is usually a sign that it needs replacing.

[Uranium-235]

Re: Dell W4200HD No power

Every time I read up on this tv there is always some LEDs lit when plugged in, and I get none. Here is a pic around the ac input and the four big mains (one top cut off by me)

[budm]

Re: Dell W4200HD No power

So NONE of the dcv out connectors have any DCV at all when running the board by itself?

Samsung LJ44-00068A (PS-423-SD, UL6500) Power Supply Unit.
http://www.shopjimmy.com/samsung-lj4...er-supply.htm#

[Uranium-235]

Re: Dell W4200HD No power

my japanese isn't up to par. Do you have a volt pinout to the XYZ boards?

or any diagnostic points?

[Uranium-235]

Re: Dell W4200HD No power

added information:

I get a buzzing sound around L8003 (circled)

in addition. When I unplug it, about 2 seconds later one of the green leds blinks for a fraction of a second

the customer told me a power surge might have been the responsible, part of his house is ungrounded.

[budm]

Re: Dell W4200HD No power

Well, there are labels for those pins of the connectors on that power supply board, what are the Voltages for each one of those pins (put down pin name follow by the DCV reading so we can at least see what Voltages are missing, that will be a starting point.

[Uranium-235]

Re: Dell W4200HD No power

VSB, VE, pretty much all diagnostic points read 0 except DC_VCC, reads 125DC, so its going past the rectifier