Viore t.v. same problem but if i disconnect ysus board will stay on

it might be one of three actually, it could be the ysus, xsus or buffer boards.Unfortunately i cant find a free version of the service manual, but i am sure you can buy a cheap one from ebay. I would get one of those and that will explain how to derive which board has gone bad

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.

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

it is the y-sustain board that has a blown fuse.. it is problably the one on the left. by replacing the fuse wont solve the issue, you need to replace the whole board.

Ur tv the projection lamp,inside the tv now,been on an in used about 4 or 5 hours a day,the bulb been inside tv about 1 1/2 or 2 years?The projection lamp life is over,reqiure changing?Turn tv on hear alot of clicking too?The board call the Ballast board also require changing too,this Ballast board help to ignite the projection lamp.

You will need to replace the ysus board as one of the drivers on there is shorted.

The YSUS Board Was Bad

If the back was off the board on the left is your Ysus board. It will have a cable plugged into the right side of the board from the signal board. Unplug the the Ysus board. If it stays on without a picture change both Y and Z sustain boards. If this helps let me know.