I have a Grainy Screen with Horizontal lines, There is picture behind this. Is this th Ysus Board? I have a HP PL4260N 42 In

Hi- My PL4260N stopped working after about three years, the audio worked but no video at all. The TV worked fine until one day...no more picture.
I found out that the YSUS and ZSUS boards in the TC fail alot...BUT you can get new or repaired ones off of EBAY...
First check for failed components (burned, loose, bulging, etc.) if nothing obvious is failed then check the fuses on the YSUS, ZSUS, and power supply boards...usually if a board has a blown fuse the board needs to be replaced...get the part number and search it in Google and eBay and you will find options for replace/repair.
Mine had a blown fuse on the YSUS board...I got it fixed for $75 through coppell TV (they are on Ebay)....
Now my TV works fine again!
Good luck.

Check if FS2 is open on the Ysus, if open then the Ysus board has a short circuit between VS and ground due to a defective IC18. IC18 is the hybrid under the heatsink.
Let me know if you require further info.

Sounds like the YSUS board may have died. It's a common problem with plasmas.

Put the TV on a table, screen down with a blanket under it. Just remove the back cover to get at the YSUS Board. It's in the left upper corner.

The board looks like this, I removed the Heat-sink to get at the IC under it. But once you remove it you can send it in for repair.

http://img.photobucket.com/albums/v472/MurphyDawg/Electronic/YSUSBoard.jpg

Hello,
The T-con board, the board that sit right in the middle of the center LCD panel . That board is dying. try websites like shopjimmy.com, Ebay.com to buy a refurbish T-con board for replacement.

Thanks for using fixya

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.

NEW YSUS AND BUFFER BOARDS ARE NOW NEEDED THE YSUS IS THE BIG BOARD IN THERE VERY LEFT HAND SIDE ONCE BACK IS OFF BIG BOARD WITH 1 BIG HEATSINK,, THAT AND THE BUFFER BOARD PUSHES INTO THAT WITH TWO BLACK CONNECTION TO THE YSUS REMOVE BOTH BUFFER IS FIDDLEY,,NEED TO REMOVE 4 RIBBON CABLES ATTACHED TO THE SCREEN B4 HAND,,

6871QYH053B IS YSUS MODEL BUFFER U WILL ALSO FIND ON EBAY.

Did you try buying a new HDMI cable? You can also try some of the solutions in the post called "Hp 42 plasma tv cptoh 0602 I get sound but no picture."

maybe z board bad need replaced

I spoke to Hp tonight and was told that it is the ysus board, hope this helps. Ebay for 175