Question about HP PL4260N 42 in. Plasma HDTV

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The y sus board made a poping sound and the fuse is burned. what can be wrong?

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The popping sound came from IC18.
IC18 board has an internal short causing FS2 to blow, It would be recommended to replace the entire Ysus board or if you are able to find IC18 and replace it yourself; but this is could be difficult task to desolder because of the heavy grounds and double sided board.
Let me know if you require further assistance.

Posted on Nov 12, 2010

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We have changed the Y sus and the Zsus boards and the power supply we still have NO video we have good sound only a black screen no flicker or nothing Thanks Walter


Than ur tv the 2 buffers boards are good.Nothig are wrong with the Y SUS or Z SUS boards.The tv Tuner signal board is dead,that the board,where the incomming broadcasting signal cable plug into it.Try website like Ebay.com to buy a refurbish Tuner signal board for the replacement.

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You need the ysus board. This is a very common problem with LG's. If it is coming up with the fuse removed you are essentially removing the short from the power supply so that it can come up and deliver other voltages for sound and all. Check out encompassparts.com if you are going to try to repair this yourself. Thanks

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I have a MAGNAV0X 42MF231D/331D PLASMA TV when I turned it on last night it made a poping sound and now I have a black screen. What could it be and is it worth fixing?


Hmmmm..sounds to me that the power supply has blown. Remove the back cover with no power to the tv, and check the central power supply board.You may find that the capacitors on it have exploded (they should have flat tops on them and bulge up and sometimes excrete a brown liquid when faulty). If these are faulty replace all and all should be ok..Also another problem could be an exploded y-sus buffer chip.Looking from the back..it is located along the far left side.Check that none of the chips which are covered in clear resin have shot or gone brown along their edges.If they have, you need to replace the y-sus and the y-sus buffer.
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Oct 17, 2009 | Televison & Video

1 Answer

No picture


If it is a LCD, then the LCD panel is bad. If you are getting sound, it usually means the power supply and main boards are good but the LCD panel is defective.

If it is a PLASMA, it could be a number of boards ranging form the y-sus, z-sus(x-sus), y-drives... You need to check the voltages with a Digital Multimeter to determine what is wrong with a PLASMA that has sound and no picture.

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1 Answer

Vizio p50hdm loud pop from inside tv now screen is dim


Hi there! This could be as a result of several boards. Y-sus, Z-Sus or power supply. One would need to check that all the relevant Voltages on the power supply are actually present. Next would be to check the Fuses on either Y or Z-Sus boards. The board with the fuse blown would most likely be the one at fault. However it blows for a reason so replacing the fuse on these boards will probably not help. But it is worth a shot. If all else fails refer to a repairer. If you can get the boards and want to try doing it yourself it may or may not prove to be successful. Please beware of HIGH CURRENT before you proceed. Best Wishes and Good Luck, JUS004

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2 Answers

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I think you probably mean the Y-Sustain board which does have fuse which can blow. This board is on the left hand side (as you look from the rear of the TV). Occassionally other factors can be responsible for this fuse to blow such as the buffer PCB which works in conjunction with the Sustain board. An established repair service centre or a supplier on-line will porvide a replacement for you.

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1 Answer

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SOMETHING IS LOADING DOWN THE POWER SUPPLY...COULD BE THE Y-SUS BOARD OR UPPER OR LOWER Y-DRIVE BUFFERS...TAKE THE BACK OFF SET..GIVE IT THE SMELL TEST AND EYEBALL THE FLAT I.C.`S ON THE THIN BOARDS TO THE LEFT OF Y-SUS BD. IF NO BURNING SMELL AND NO CRACKS ON THE FLAT I.C.`S ...TRY REPLACING THE Y-SUS BOARD...NUMBER ONE PRIME SUSPECT...DO NOT POWER UP SET WITH BACK OFF UNLESS YOU ARE QUALIFIED SERVICE TECH...JOE ACE

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Hi there I got a YSUS ZSUS Control board kit off ebay. It is supposed to fix the problem. $35 from ebay and $230 from Sony. Lets hope it works

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6 Answers

My LG Plasma TV RU42PX10C


Hi all..i had the same problem with my 42 inch LG
rz42px11. its a faulty zsus board(Z sustain part no 6871QZH033A) the pop
sound was the fuse on the board blowing.not that hard to replace but be careful with the connector ribbons! got my replacement from
https://www.chsinteractive.co.uk/ £150....expensive,but probably cheaper than
calling someone out to fix it.
P.S i tried just to replace the fuse on the board T2AH 250v but it blew,i think the fact the fuse blows means the board is faulty..but you could try.
hope this helps someone.
Good Luck

Dec 21, 2007 | LG RU-42PX11 42 in. EDTV-Ready Plasma...

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