HP PL4260N plasma question.

[Chaiyz]

I don't usually work on plasma's but a customer had an issue with this one and after he read the horrible reports on HP's support site he purchased a new LED set and donated this one to the shop.
Plug it in, blue light on main board lights up and then there are 2 clicks from what I'm assuming is the PSU and then a second blue led on mainboard lights up. After about 10 seconds I hear a third click from PSU and the 2nd blue light goes off.

I'm not turning on power or anything. The power button is red when plugged in, turnes purple after the two clicks and when last click comes, it goes red again. Button unresponsive at all times.

Anyone have a handle on this set? I don't know where to start. Pulled back access panel but it' not to the PSU, I can see PSU's caps without removing back cover, none swollen. Maybe a fuse? I'm waiting for a response before stripping this thing down.

Thanks for looking.

[MyEvolution]

Re: HP PL4260N plasma question.

I found the same tv abondoned outside of a mobile home my company was going to demo. Brought it home, plugged it in, same symptoms as yours. Opened it up to find fuse blown in ysus board. After doing a bit of research, I found its common for that board to have a short on one if the components ( cant remember which one). Coppell TV Repair offers a service to fix the problem. I sent them my board, got it back quickly, installed to find the TV working! I did have sparkles after board service that @ the time I didn't know how to fix. Ran the TV for awhile like that before finding this forum... I'm not an expert, though y & z sustain boards are common failure parts on this model...

[capkid]

Re: HP PL4260N plasma question.

If you discover that you have sound and no picture, it's most likely an IPM failure (the large IC under the large heat sink on the Y-Sus and Z-Sus). It's recommended that the IPMs on both the Y-Sus and Z-Sus be replaced at the same time. You may have other bad components on the board, but an IPM and fuse replacement may be enough to get it working properly.