Question about Sylvania 6842THG 42 in. Plasma HDTV

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The screen went out. There is no picture. Just snow on the screen. What happened?

I took it to a repair shop and the gentleman said the Ysus and the Ydriver went out. Is that expensive to repair?

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Go back and ask him.

Posted on Nov 13, 2014

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1 Answer

Picture went out on Vizio P50HDM


Check you voltages before just swapping out boards. Although a YSUS is common for no picture, so is your upper and lower Y Buffer boards or the panel itself. Check youe -VSC voltage. Does it look like it is being loaded down? If so then your YSUS is not the problem. You can run the set with just the upper or lower Y Buffer boards untill the load is gone. That will let you know wich board to replace.

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We bought a Sony Bravia LCD 37" TV in August of 2008 for just under $900. Last week the picture went fuzzy and then disappeared. The sound remained. We took the TV to a local TV repair shop and have...


i would take the tv to another repair shop as it sounds , although i cant be certain, that your xsus ysus, or buffer boards have failed. Even if all three went i cant see them costing a $1000 to purchase.

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Screen problem with my LG 50" Plasma TV


its the buffer driver board the big long board that plugs into your tv,, i have one for sale if u need one,,30£..promo7uk2@hotmail.com

free+p+p

this will cause the lines on your tv after replacing the ysus it could well be that ysus mabe faulty still if u replace buffer and find u still have the lines 9/10 times when the ysus goes it normally takes out the buffer board on these worst cases the control board,, but im 98% shure its buffer board.. let me know on here if u find out.

Apr 21, 2010 | LG 42PX5D 42 in. Plasma HDTV

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While checking Vscan voltages on my LG du-42px12x picture died.


I have the same problem the pic went out but have sound. where do i go to get the Yboard? do i need a special number off of it or something? I took it to repair shop and he said it would be like 500 dollarss to repair. but i see all kind of yboards on ebay for like 150?? how do I know what one to buy?

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1 Answer

To make a long story short originally bought the LG du-42px12x with a bad ysus board(no picture just sound) replaced the ysus now the picture and sound work great but there are colorful dots all over the...


Sounds like the y sus was blown out but what cause it. Were you careful when you were checking voltages? As long as you didn't short 2 components together, your y sus should be fine. Unless the y buffer up and/or down blew them out. Even the panel could blow it.

Basically you need a scope to adjust the ramps and everything. You can adjust VA and VS with a meter. If you don't have access to a scope, then just start changing the ramps etc by eye. It might take a little bit to get but eventually you'll get it.

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I have a Samsung SP-S4223 42in. EDTV.


This is called tiling and this happends because of a weak signal from whatever device you have hooked to it weather it be cable or a sat dish. Try checking and makie sure you have good signal to this. If this matter gets wrose then you would need a repairman. Thanks

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NORCENT PT -4233


Norcent PT4233 no picture, black screen, but has sound. How to repair

The display (PDP - Plasma Display Panel) at the heart of this unit is a LG 42V7 model. There is a known bad solder "defect" on the YSUS board that causes this board to fall unexpectedly.

The bad news is that you have to replace all the primary boards on the display - ZSUS, YSUS and CTRL boards, as the failure can/often takes them all out.

The good news is that LG makes a repair kit for this panel. Its part number is 687VSNB03E and it contains the three boards LG6871QYH036D (Y SUSTAIN), LG6871QZH041B (Z SUSTAIN) and LG6871QCH053G (CTRL).

Hope this helps

Sep 04, 2008 | Norcent Technologies2703 27" TV

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