Need help with TV - won't turn on/power up - only standby - AVS Forum
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post #1 of 10 Old 05-21-2008, 06:07 PM - Thread Starter
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Hi everyone,

I'm new here and to plasma TVs and I hope this post is in the right area.

I was given an Audiovox FPE4216P which it seems is the same as an Insignia NS-42PDP and uses some of the same boards as LG 42PC3D LG 42HP66, HP CPT0H-0602, HP PL4260N42, TOSHIBA 42HP66, MAXENT P420142X3, Sony FWD-42PX2. Not sure if that has anything to do with anything though.

The short: When I press the power button, the light on the front goes from red (standby) to blue for about a second and then back to red. Once pushed, the power button will no longer have any effect. If I unplug the unit and then plug it back in, I can duplicate the above.

The long: Originally, the previous owner said that there was a small area of red tinting in the top center of the screen which eventually made it's way across the top and down the center. The rest of the image was fine and they watched it that way.

One day while watching something, the TV turned itself off and would not power back up.

When I got it home and plugged it in, the indicator light would go from red to blue for about three minutes then back to red. The screen made no attempt to come on. I opened it up and found that the LED on what I think is the main power board (PN 667-PH42FB6-20/782-PH42D8-200) would not light up. I hooked the TV up to an input, could select it with the remote and would get sound only. I later found a bad fuse in the YSUS board (PN 6871QYH953A or 6870qyh005B or 6871QYH053B or EAX31974801 or EBR31872801) - these all seem to be the same board. Once replaced, I get the symptoms described above in "the short". The LED on the power board does however light up now and remain lit after the first press of the power button.

Does anybody have any idea what may be wrong or how I should proceed?

Thank you very much!
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post #2 of 10 Old 05-22-2008, 07:46 AM
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i think you should get the service manual...that will tell you what the 3 blinks mean.
for the service manual, search the internet, there are sites that soft manuals


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Originally Posted by Tushy View Post

Hi everyone,

I'm new here and to plasma TVs and I hope this post is in the right area.

I was given an Audiovox FPE4216P which it seems is the same as an Insignia NS-42PDP and uses some of the same boards as LG 42PC3D LG 42HP66, HP CPT0H-0602, HP PL4260N42, TOSHIBA 42HP66, MAXENT P420142X3, Sony FWD-42PX2. Not sure if that has anything to do with anything though.

The short: When I press the power button, the light on the front goes from red (standby) to blue for about a second and then back to red. Once pushed, the power button will no longer have any effect. If I unplug the unit and then plug it back in, I can duplicate the above.

The long: Originally, the previous owner said that there was a small area of red tinting in the top center of the screen which eventually made it's way across the top and down the center. The rest of the image was fine and they watched it that way.

One day while watching something, the TV turned itself off and would not power back up.

When I got it home and plugged it in, the indicator light would go from red to blue for about three minutes then back to red. The screen made no attempt to come on. I opened it up and found that the LED on what I think is the main power board (PN 667-PH42FB6-20/782-PH42D8-200) would not light up. I hooked the TV up to an input, could select it with the remote and would get sound only. I later found a bad fuse in the YSUS board (PN 6871QYH953A or 6870qyh005B or 6871QYH053B or EAX31974801 or EBR31872801) - these all seem to be the same board. Once replaced, I get the symptoms described above in "the short". The LED on the power board does however light up now and remain lit after the first press of the power button.

Does anybody have any idea what may be wrong or how I should proceed?

Thank you very much!

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post #3 of 10 Old 05-22-2008, 12:58 PM - Thread Starter
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Thanks for the reply.

I agree with you on the service manual but I'm not getting any blinks from the Led on the front of the set nor from the one mounted on the power board inside.
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post #4 of 10 Old 05-23-2008, 03:15 PM
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n blinks = more work for you....many tvs narrow down the failure mode by the number of red/blue blinks...good luck..please post the resolution

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Originally Posted by Tushy View Post

Thanks for the reply.

I agree with you on the service manual but I'm not getting any blinks from the Led on the front of the set nor from the one mounted on the power board inside.

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post #5 of 10 Old 06-11-2008, 06:09 PM - Thread Starter
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After swapping the YSUS with a "new" one, I now have picture. Unfortunately, I now have the "red sparkles" problem.

I haven't fully researched this problem yet but what I've read so far is that it could be the control board or improper voltage settings on some pots.

Can anyone here help steer me in the right direction?

Thanks.
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post #6 of 10 Old 06-21-2008, 04:29 PM - Thread Starter
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This post is basically for anyone that stumbles across it trying to fix what seems like two fairly common problems with plasma tvs. I apologize for the length of it but hope it can help others.

To start off, I got a free Audiovox FPE4216P 42" Plasma TV.

The previous owner said that there was a red cloud in the top center that after time spread across the top and down the center of the screen. Some time later, they were watching it and it was as if someone simply turned the power off. After that, there was no longer any picture - menu or otherwise.

After much research on the net, it seems that fixing plasma TVs is strongly based on the educational guess method. This compounded by the fact that replacement parts are quite scarce and generally crappy customer service provided by the manufacturer if the TV is older than 14 months basically makes many of these TVs $2000 doorstops if something goes wrong with them. Luckily, my TV uses many LG boards which seem to be used in a number of different makes and models.

NO DISPLAY ISSUE:

Once I took the set apart, I first checked the power coming into it and it checked out ok. I then found a fuse on the YSUS board that had blown, upon replacing it, I no longer had sound. The indicator light on the front would turn from red to blue for about 3 min then back to red. After this happened, the LED on the power board would light up and the there was no longer any response from the power button (led on front would only stay red). I would have to unplug the set and plug it back in to duplicate the above.

I then checked the voltages for Vs, Va and 5v on the connectors coming off the power board (using the DC setting on a voltmeter) against the specs on the sticker on the back of the display panel and they checked out.

It was recommended that I change the YSUS board since the fuse had blown on that board. This seemed counter-intuitive to me since it seemed that the power was fed into the YSUS board through that fuse first as if to protect the YSUS board.

With reluctance, I purchased a "new" YSUS board. Once I popped it in - presto! I had picture! But picture with a cloudy, sparkly red "I" beam that would show through the dark areas of images including the menu screens. It seemed that as long as there was a color over where the "I" beam ran, it was fine and there was only a problem when the image was supposed to be black.

RED DOTS - SPARKLES - SPECKLES - and possibly MAL DISCHARGE ISSUE:

I say possibly mal discharge because it seems that some label this problem as such where some describe mal discharge as another problem.

After much research on the net (again), it seems that there are two fixes for this problem: 1 - a new control board and 2 - adjusting the voltages. It seems that each fix has about a 30 - 50% success rate. With the first fix, you just pop in a new board and you could be done or you could have the same problem. With the second fix, people have said that the dots have gone but the image is now crappy or they have different color dots. Some also say that merely changing voltages will only temporarily fix it. I opted for the cheaper second fix.

My power board has two potentiometers (pots) on it (adjustable dial thingies). One for the Vs and one for the Va. I first made sure that these were adjusted to spec. I took readings off of the molex connector and grounded to the support bracket of the set.

My YSUS board has 4 pots, two are labeled SetUp and SetDn and the other two are on little circuit boards rising off the YSUS board - one of which was completely inaccessible due to it's position behind the support bracket.

I first set the TV to an empty input since the red showed best against all black. Jacking up the SetUp pot seemed to have the effect of making the black really black and essentially removing the red. SetDn didn't seem to due much and I didn't mess with the other pots. When I switched to an active source everything looked great but then I started to notice that on bright images that weren't quite white, there was blotchy pixelation and redness. It then started messing with all three accessible pots and got the image to be really good but I could still see some red and now blue sparkles in the dark areas.

I was pretty satisfied with my results but there was that one other pot that I could not get to unless I removed the YSUS board. Since I knew I would have to adjust that pot multiple times, I decided to remove the board and drill a small hole in the support bracket to gain access to the pot with the board installed. For me, this was the most difficult and frightening part. I didn't want to damage the panel itself and I also didn't want to get metal shavings everywhere. I carefully masked off the area and nearby boards with paper and when I drilled I held a piece of wood behind the bracket.

I then had access to all 4 pots and just kept messing with different balances between them. I used an empty input to check the black and numerous DVD's to look for crappy picture on lighter areas. As it turns out, the menu for the Underdog DVD really showed the light image flaws.

Now, the image is about 98% perfect. When a lighter image turns to complete black, there are some, extremely diffuse red and blue brief pixel flashes (just for a millisecond) but then the black stays black. To notice it, you have to be within 3 or 4 feet of the TV which I think is too close anyway for a 42" TV and is virtually non-existent when watching DVDs.

Here is some extra part number info with possible equivalents:

YSUS: 6871QYH953A or 6870qyh005B and possibly 6871QYH053B EAX31974801 EBR31872801 EBR32642701 6870QYH105B EAX31631001 EBR32642702 1032298-hs

Control Board: 6871qch977b or 6870qch0C6b and possibly 6870qch006b 6871QCH077B 5070-5623

Power Supply Board: 667-PH42FB6-20 or 782-PH42D8-200a and possibly 6FB0192010
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post #7 of 10 Old 05-30-2009, 10:52 AM
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Kudos to you Tushy. I am in the middle of the same thing. I never had the red or blue flashing...it just went. I have it open now and plugged in Red standby light comes on, then press it to Blue...no signal. Thinking about the YSUS borad that is under the framing. My board is a YSUS 6871QYGH953A...will go test the fuse now
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post #8 of 10 Old 06-01-2009, 07:17 PM
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I had a similar problem to what is described on this forum - TV gone blank. I have followed advise to replace the YSUS (6871QYH953A), which solved my problem only partly - the left half of the screen is perfect, while the right half of the screen is messed up, with vertical bars/white bands. I bought a refurbished YSUS part since I could not find a new one - now I am not sure if a) the YSUS I bought is bad, b) I need to adjust something for it to work, c) I need to replace another part as well. I would appreciate any suggestions/help anyone can offer.
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post #9 of 10 Old 06-04-2009, 02:05 AM
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Thanks for all the alternative ysus board numbers, they came in handy!

Wind-crazy. Carefully check that you put all the flat flex cables in straight and solid.
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post #10 of 10 Old 07-02-2009, 11:06 AM
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I haven't gotten anywhere yet myself
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