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Zenith Z50PJ240 powers on and turns off relays click while its doing this unplugged ysus and zsus no change unplugged comp board tv turns on red light goes out but will not power down then.

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  • Televison & ... Master
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It becomes first a case of checking voltages to and from power supply first and then a guessing game---which board will you buy and try first?

Posted on Nov 07, 2012

  • David Evans Nov 07, 2012

    I was planning on buying the main power board, everything i have read points to it being the culprit. Which leads should i test, and what kind of voltages should be good/bad etc. thanks!!!

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 3 Answers

SOURCE: no power up

The YSUS Board Was Bad

Posted on Jan 01, 2009

  • 85 Answers

SOURCE: LG 50PX1D, YSUS and ZSUS board replacement

first thing that you can do is use the Google serch by just typing in lg 50px1d and see if you get any thing close to what you need.

Posted on Jan 06, 2009

phil_frye
  • 295 Answers

SOURCE: Haier 42EP24S, no screen, YSUS fuse blown, red light flashes one

I'm sure you can find a Service Manual for this on line but there would be a cost for it. I wouldn't doubt you could find it for under $20.00.
I believe one of two things are going on with this unit.
If a fuse went then it's drawing too much voltage. The biggest thoughts is that there are some capacitors that are going bad, 'aren't keeping the charge they are suppose too.' Many times you can see on the top of capacitors bubbled/popped up. Normally they should be flat. This is the first thing I would check. NOTE: Their voltage and rating are printed on their side.But please also note they have a negative (-) and positive ( +) lead to them.
Good things to look over!
Blessings,
A/V Media Guy

Posted on Nov 23, 2009

  • 2318 Answers

SOURCE: Some troubleshooting help please.

The part that caused the fuse to blow is the hybrid that is mounted underneath the heatsink on the YSUS and ZSUS boards. The part used on these boards might be YPPD-J017C or YPPD-J018C, in about 90% of the time, replacing these hybrids fixes the plasmas with no video but good audio. Since VS and GND is shorted, that means that the hybrid has shorted internally. Most service techs would rather replace the entire YSUS or ZSUS boards since the hybrids are very difficult to remove.
Let me know if you require further assistance.

Posted on Apr 09, 2010

Testimonial: "Appreciate the good info and quick reply. THANKS VERY MUCH"

  • 1 Answer

SOURCE: Clicking relay no picture no audio no power light red or blue

here is the schematics http://www.scribd.com/doc/33598674/Philips-42mf231d-Chassis-Tpe1-0u-Pa

Posted on Aug 14, 2010

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My LGPA4500-UF plasma tv has no picture only a clicking sound. I changed out the ZSUS Board same problem.Could it be YSUS or Power source unit?


hi i'd check the buffer boards that connect to the ysus board for white dots if there are some, the buffers need replacing and i'd replace the ysus as well thanks

shaun

Feb 15, 2017 | Televison & Video

1 Answer

Green light flashes then screen goes off


Disconnect ZSUS board (the one to the right of the power board from the back) from the Y board (the one to the left of the TV from the back) and try to power on again, see if it stays on.

If yes that's the bad board.

If not disconnect the Y board from power and try again.

TV may still shut itself off, but the timing should be different, even if slightly different.

use www.coppelltvrepair.com/newservice to send either or both boards for repair.

As of today (oct 2012) prices are fixed at $100 for ZSUS and $120 for YSUS.

Oct 07, 2012 | Zenith Z50PX2D 50 in. Plasma HDTV

1 Answer

Zenith z50pj240 has sound but no picture


Make sure all cables are plugged in where they should be, the scart cables are important.
Open the PICTURE MENU and try to adjust brightness and contrast.
Good luck
Kolbrun
goo

Mar 18, 2012 | Zenith Z50P3 50 in. Plasma TV

1 Answer

I have a 50in vizio hdtv20a and the amber light is on in the corner but it will not power up


The number one reason for this is failed YSUS board EAX37106201 . There are two ICs on it and one of them shorts, preventing the TV to power on.

The second most common reason is failed power board EAY32929001. There are several different things that can happen on it, but the first I'd look for if I were you is visually swollen electrolytic capacitors on the board. Look that up on Google and you'll see plenty of pictures of what to expect.

The third reason would be a bad ZSUS board EAX34042701 / EBR37284601 . Same as with the YSUS, only this is less common and, this one can actually be tested really easy by disconnecting the ZSUS from power and trying to power on the TV again. If it does come on (even with blank screen) then it's the ZSUS that is bad.

You can and should do the same with the YSUS, but it will only work if the ZSUS gets power directly from the power board and NOT through the YSUS board. I am not sure how they were on P50HDTV20A in particular, but in those models usually the ZSUS gets power through the YSUS and thus if you disconnect YSUS from power you automatically disconnect ZSUS as well, which is not good for tests as the power board needs load on the Vs line.

Well...hope that helped...don't forget to rate it if it did!

For more check out http://blog.coppelltvrepair.com or email us directly.

Sep 18, 2011 | Televison & Video

1 Answer

TV is dead. Power light is not illuminated. Checked all plugs and outlets.


It sounds like your power supply has failed. This could be caused by bad capacitors in the power supply itself, or it could be caused by some other circuit board, likely the Y-sustain or Z-sustain board, or both.

This solution assumes you feel comfortable working on the tv yourself - if not, it will need to be fixed by a service technician.

Begin by removing the back cover. You'll need to take out all the screws that have an arrow pointing at them. You'll only need to remove the large cover, not the smaller one where the audio/video connections are located. Put the screws in a plastic sandwich bag so they don't get lost.

The power supply board is in the center top area. Check the tops of all the capacitors. They should all be flat. If any of them are bowed out or deformed then you have a bad power supply board that will need to be replaced, or replace the caps if you're capable. If the caps look ok then check the fuse at the bottom right of the power supply board. Go to the appropriate paragraph below.

1) IF THE FUSE IS GOOD: you likely have a problem with one of the sustain boards. Unplug the connectors on the Y Sustain (Ysus) that sit between the two fuses. Plug in the tv and see if the power supply board comes up. If it does you'll hear a click and see the green light on the front begin flashing. This indicates one or both of the sustain boards has failed.

To determine which board has failed, reconnect the Ysus connector from the power supply and disconnect the connector at the top left of the Zsus board. Try turning on the tv. If the power supply comes up then you have a problem with the Zsus board. If it doesn't come up you have a problem with the Ysus board and/or the Zsus board. The power for the Zsus board is routed through the Ysus board, so if the Ysus board is bad you won't be able to check the Zsus board.

Many blogs recommend replacing both if one is bad because they're both high failure items, and replacing one without the other means you may have to go back and replace the other after a short while.

2) IF THE FUSE IS BAD: You may have a problem with the power supply board. Check the caps for any deformed tops. If so, you'll have to replace the board or the caps, depending on your skill level. After making the replacement, disconnect the power to the Ysus and verify you have a good power supply board.



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phillip_d971_0.jpg

Jun 23, 2011 | Zenith Z50P3 50 in. Plasma TV

1 Answer

Hi. I have a Zenith 42" plasma TV - Z42PQ20 that's


I had this exact problem on my TV, everything said it was the power board. It wasnt, luckily i was able to return that board. It was the YSUS board.

I should have done this this first but this is how i verified the old power board was good. Unplug TV, take the cover off and disconnect the wire harness going to the YSUS, plug TV in and turn on. If led stay blue its the YSUS.

Mar 19, 2011 | Zenith Televison & Video

2 Answers

I turn it on and it turns itself right back off


The Zsus and or the Ysus boards are common failures. You can unplug the Zsus board from the power supply and if the power stays on, I would replace both the Zsus and Ysus boards.
I hope this helps,
Skyassoc

Dec 08, 2010 | Hitachi 42HDM12 42 in. Plasma Television

1 Answer

How to change lamp in toshiba 42hp66?


This TV is a plasma according to the model number you've posted. It does not use a lamp.
If the plasma does not show any picture, there might be a defective Ysus, Zsus or power suppy board.
There is a high failure rate on the Ysus and Zsus boards.
Search for a Ysus and Zsus board on google and you should find them.
Good Luck.

Jul 02, 2009 | Televison & Video

2 Answers

Toshiba 50HP95


Today's Plasmas and LCD are more challenging to troubleshoot to the component level as most service techs replace the entire assemblies.
I would suggest to start by measuring the voltages from the power supply to the Ysus and Zsus board, those voltages will appear for a short time since the TV goes back to shutdown mode. Check all the fuses on the Ysus and Zsus boards as well, any blow fuse will indicate that a transistor or mosfet has shorted out. Most power issues are related to the Ysus and power supply assemblies.

Jan 06, 2009 | Toshiba 50HP95 50 in. Plasma Television

1 Answer

Tv will not come on


The tv has to supplies, one is a reference that drives the cpu and turns on the HV side when everything is good. If the cpu dectets an improper voltage it will cause a protection fault preventing the set from powering on the High voltage. This can be do to the power supply, Zsus and Ysus boards. If your good with a meter, you can check for shorted caps or fets on these boards and find the problem. This is done with the tv unplugged.

Oct 31, 2007 | Akai PDP-5016H 50 in. HD-Ready Plasma...

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