Question about Vizio L32 32 in. LCD HDTV

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Y Sustain Board 6871QYH039A

When I turn on my TV the FS1 fuse (4.0A250V) in the Y Sustain Board blows out. Please help me fix this problem!

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I am sorry you can't  fix this board, you have to replace it for another one check with or discount merchant the may have it.also try tritronics. good luck

Posted on Jun 14, 2009


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My LG TV model 42PC5D has a black stripe with red blue and green lines in it. I was told that its cold solder joints but when I put pressure on the boards the problem does not go away, does anyone know...

Hello, have you checked the fuses on the y sustain board and the x sustain board to see if they are blown? If one is blown you will need to replace the whole board because if you replace the fuse chances are it will blow the control board. Hope this helps.

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Feb 22, 2013 | Televison & Video

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Hi! Thank you for your help. I have a Samsung TV

Hi Doug Rudnik,

First of all thank you for contacting regarding on your TV problem.

You've mentioned that you can hear a sound for 1 sec and then the unit immediately turned off and there's a constant red LED lit. The symptoms you've described indicates that the main board of your unit is working fine and it automatically shuts off because it sensed malfunction on image boards. The constant red LED means that it is on standby mode only.

Now, since you've replaced the power supply board but still the symptoms persist, then the suspect is either the X or Y sustain board but high chance that the fault came from the Y sustain board based on my experienced. Y sustain board is located on the left side of your unit while the X sustain board is on the right side if you are facing the rear cover. These boards has a ceramic fuse(white color) and pico fuse(looks like resistor), please check the continuity of the fuses to determine which board gone to malfunction. If you found an open fuse to Y-sustain board then you need to replaced it. Blown fuse means that the circuitry on its line gone to excessive current.

I would advice you also to inspect the electrolytic capacitors on these boards. Most of the time loud pop came from a blown capacitor and has a physical indication of fault like bulged/dome at the top and can be easily identify through visual inspection. It can give you an idea also which board gone to malfunction. See sample picture below of faulty electrolytic capacitor with bulged dome at the top.


Here's the link for X and Y sustain board.

Y sustain board

X sustain board

Hope I've gave you an idea what's going wrong to your set.

Have a nice day and take care!

Kind Regards,


Dec 06, 2011 | Samsung Televison & Video

1 Answer

I replaced the module on YSUS board and replaced the FS2 fuse on hp cptoh-0602 plazma tv. TV worked great for about 2 hrs of usage time. however, while i was changing the channal few days later since...

Usually, when you replace Y-sustain board, for older plasma, they suggest to replace both Ydrive board (up and low). And sometimes, Z-sustaint.

Im not sure your are an expertise in this matter so be very careful when you open a TV because hasardous voltages can kill you in the worst escenario.

If you are not, don't work on your TV. It will be your sole responsibility.

Check ships on Y drive board (both board are installed on the right side of Y-sustain. They have square black ships that used to get bad. If they don't have aluminum cooler on them, you can see if they are burned or have holes on them. Old plasmas use to have issues with those boards. Before you installed the Y Sustain you should check Ydrive boards. Maybe you damage the Y Sustain because the Y drives weren't good.

Try to replace the fuse, disconnect the Ydrive from Y Sustain, turn on TV and check for voltages on Y sustain (panel has a sticker with each voltage). Hope you didn't damage Y sustain and can find Ydrive board to fix your TV.

And REMEMBER, you can kill yourself when you work on TVs.

Sep 26, 2011 | HP PL4260N 42 in. Plasma HDTV

1 Answer

How do I test the y-sustain main board from a philips plasma model is 42PF7220A/37 the Y-Main sustain number is LJ92-01200A....both buffers tested bad but now I dont know how to test the y-main...i...


As such boards are cheap and fail quite easily (both the two sustain and the buffers) Philips service manuals are more oriented at board swapping then at proper testing. In this particular case the buffer boards fail very easily because of a bad soldering to IC. The short will regularly blow the main sustain board.

To start when a main sustain (e.g. Ysus) is fried the TV will go in protect mode with the led flashing in standby. One test is done disconnecting the Sus board (with power off) and restarting the TV. If TV does not go in protect, then the sustain board was good.

If there is no protection:

The first thing to check on a main sustain board is the fuse. If the fuse has blown the IC is probably fried.I believe fuse is F5004. Check for swollen capacitors that may have blown. Test the FET. That is the core of the board as it is the power amplifier.

Here the service manual:PHILIPS_SM_15540.pdf - Right Click "Save Target As"

Here a more useful service manual. Check and follow troubleshooting diagrams in manual.

Here some troubleshooting from users.

Note:if buffer board was shorted, then the main sustain board is usually faulty.



Sep 13, 2011 | Philips Televison & Video

4 Answers

The screen just turned black and I could still hear sound but now I can't. I did change the input to check if it was the cable box so that covers the sound but I still cannot even get the sound back now...

Hello, My names Dave and I can tell you that you all most likely have a bad Z sustain or Y sustain board! The good news is that most of the time if either of these boards are bad you will find a blown fuss one them! I have worked on this same model of TV many times! You can lay the TV face down very gently and remove the back cover from the TV and test the fuses on the Z & Y sustain boards to confirm which one of the two are bad!

Z sustain board! P/N's: 6871QZH956A or 6871QZH056B Here is a link to the Z sustain with a picture of the board so you'll know what you're looking for

If you look at the Z sustain board you'll see that there are two white fuses on the board FS1 & FS2 are the location #'s. There is also a third fuse (FS3) it is a surface mount type fuse and can be easily over looked. Just locate the 8 pin main plug right next to the other two fuses and you can't miss it. It's smaller and it will have gold2_bing.gif colored ends on it and it to is white with the location # FS3 next to it!! If any of these fuses are blown you will need to replace the board to complete the repair! You will need to test the fuses for continuity with a DMM (Digital Multimeter) Do to the fact that you will not be able to just look at the fuses and be able to tell if they are good or bad!

You'll also want to test the three fuses (FS1, FS2, FS3) on the Y sustain board P/N's: 6871QYH953A 6870QYH005B ! Here's a link to a picture of this board also.

Two of the fuses (FS2 & FS3) on the Y sustain are easy to find because they are normal white fast acting type fuses! The third fuse is also a surface mount type fuse and can be easily over looked. Just locate the 9 pin main plug right next to the other two fuses and you can't miss it. It's smaller and it will have gold colored ends on it and it to is white with the location # FS1 next to it!

If any of these fuses are blown you'll need to replace the board to complete the repair! You will need to test the fuses for continuity with a DMM (Digital Multimeter) Do to the fact that you will not be able to just look at the fuses and be able to tell if they are good or bad!

If you have any questions please feel free to contact me via there you will find all my contact info!


Mar 09, 2010 | Vizio P2 42 in. HD-Ready Plasma Television

2 Answers

As I was watching TV last night, my 50" LG Plasma TV 50PX1D, and it made 3 loud "popping" sound, and you can barely see the images. The picture is not jumping & the color doesn't appear to be fading in...

Either X,Y, or Z-boards seem to have developed a problem, when this happens it results in a 'sound-no-picture' condition. If its under warranty take it back, if not have your local tv repair center fix it for you....

Oct 18, 2009 | LG 50PX1D 50 in. Plasma Television

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Vizio P42HDTV10A picture faded and washed out

Try finding the gamma/brightness potentiometer and turning it ever so slightly, testing each time to see if you are adjusting it correctly. If I'm right, it will be on the same circuit board as the cable tuner. I'm not a p42 owner but my dad has a vizio of another kind with this problem.

Feb 15, 2009 | Vizio P2 42 in. HD-Ready Plasma Television

1 Answer

Tv keeep blowing the fuse

simpel fix replace the 4 bridige diodes.\
parts cost about $8.00 and labor shold be about $60 shop around for best repair shop pricing.

Jan 11, 2009 | Sharp 27R-FS1 27" TV

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Visio 42 in Plasma turns on but no picture

Just had the same problem and determined it was the primary power supply board. The TV has a primary and secondary power supply. The secondary controls the on/off and audio. The primary controls the picture. If this is shot, you will not get a picture but will hear audio. I had to call Vizio and have them send me a new power supply board ($150 + SH). Not too hard to install yourself. Hpe this helps!

Mar 15, 2008 | Vizio P2 42 in. HD-Ready Plasma Television

4 Answers

Funai tv

Open the back cover and check any fuse blow in Y Sustain board or Z Sustain board. If you do find the fuse gone, replace the board. Good luck!

Jan 25, 2008 | Funai F42PDME 42 in. Plasma Television

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