Vizio VP50 HDTV20A

[goggins.jim@gmail.com]

Re: Vizio VP50 HDTV20A

Alright back from New Jersey and ready to continue troubleshooting.. I lifted one end of the fuse in question and it is in fact open. Question at this point is do I attemtp to troubleshoot this down to the component or is it safe to replace the board?

The board is a Samsung Model No 50"HD W2 x-Main(2L) I'll standby for further direction..

Thanks and of course Happy Thanksgiving

[goggins.jim@gmail.com]

Re: Vizio VP50 HDTV20A

Reposting last post.. Thinking it may not be seen.. After returning from New Jersey I tested the fuse F4702 and it is open. This fuse is on the X-main board.. Does this indicate a bad X-main board or do we continue to troubleshoot to the component level?

Thanks and have a nice holiday!

[tw2005]

Re: Vizio VP50 HDTV20A

all I could suggest is check all the FETs for short cct, replace the fuse. Or just get an xmain, should be plenty around as they don't fail anywhere near as much as the Y side.

I've seen these going again after just after a pico fuse replacement on this forum.

[goggins.jim@gmail.com]

Re: Vizio VP50 HDTV20A

Thanks for the suggestion tw2005 -- I just ordered some pico fuses from Amazon that will be her Friday.. I'll start by first just replacing the fuse.. that would be awesome if that fixes it. It the doesn't work I'll start looking for a x-main board. There are multiple numbers on the board.. Model PBA number and a PCB number.. do all these numbers need to match the replacement part?

[goggins.jim@gmail.com]

Re: Vizio VP50 HDTV20A

Update: Replaced the Pico fuse and it did not blow..however the picture is still not quite what it should be. There continue to be black streaks running horizontally across the lower section of the screen.. mostly toward the middle of the picture. Seems to lack a crispness in the picture.. when the brightness is turned up the picture turns almost completely white.. really washed out. I'm assuming given the fuse that blew was on the X-Main board that's the board I should attempt to replace.. am I correct?

[tw2005]

Re: Vizio VP50 HDTV20A

Update: Replaced the Pico fuse and it did not blow..however the picture is still not quite what it should be. There continue to be black streaks running horizontally across the lower section of the screen.. mostly toward the middle of the picture. Seems to lack a crispness in the picture.. when the brightness is turned up the picture turns almost completely white.. really washed out. I'm assuming given the fuse that blew was on the X-Main board that's the board I should attempt to replace.. am I correct?

yeah , well if that did nothing are you sure all the others are ok and reading short across the fuse if you do a continuity check?

Otherwise I'd just get a new board just compare the revisions and numbers, appearance. Going by the fuse holder it's looking like

BN96-06518A (LJ92-01398A)
Philips 996500044496
Vizio 0940-0000-3490

They're only around the $20 so not worth stuffing around much more

http://www.paylesscomponents.com/phi...ain-board.html

http://www.shopjimmy.com/samsung-bn9...main-board.htm

[goggins.jim@gmail.com]

Re: Vizio VP50 HDTV20A

Thanks to everyones help this T.V. is now working again.. I think it's possible the Pico fuse may have been all I needed, but to play it safe I also replaced the X-Main board. I did learn that if you do not properly seat the small ribbon cable in the lower lefthand corner of the board the symtom is exactly what I was seeing. When I installed the new board at first it appeared to have the same issue.. then after reseating the small ribbon cable everything was perfect. I did not bother to retry the old board given at one time it had one open Pico fuse.. I'll set aside for use perhaps in the future... Thanks again everyone