Re: LG 60PA5500 - strange piture faliure after board swap

Yeah, i did absolutly nothing, and its working again. Maybe some protection triggered last time. I didnt increaced the VS or other voltages because they are all good from the frist day i started playing with a repair. Only the VSC and VY droping around 0.6-0.9V on full white, rest is fine. At the moment i have only that problem with the white (i made a picture).

Re: LG 60PA5500 - strange piture faliure after board swap

All voltages are maching to the panel. I checked mutiple times. And yes, i measured the buffers like you said (i had a shorted buffer before on a 60pk950). So, no clue. I have no idea why it has mal-discharge on white. Maybe the replaced IGBTs/MOSFETs are fake?...

Re: LG 60PA5500 - strange piture faliure after board swap

HY! Thank you! I checked everything, It was the same resitor like yours. R513 mine went to 800 ohm from 2.2. So the probem on the video now fixed.

Soooo back to the original problem...

All test patterns are ok, no mal discharge or any problem. But on the full white i have mal discharge. I noticed on the full wihte patter the VSC and VY are dropping 0.8-1V.

Update, new problem!!!: after few minutes the tv turned itself off. Now when i turn it on its immitietly turn back off. No...

Hy!

I have a problem with the mentiond tv.

The story:

The tv had a blown y-sus when i brought it, i replaced all the blown mosfet's/IGBT's. I turned it on, had a picture but the white test pattern had a very bad mal-discharge, red, green and blue was fine. So i brought a complete board kit from a display damaged tv. But sadly the y-sus came as defective (blown). So i just swaped the z-sus to rule out that, same problem. I replaced the 2 buffer board, and i had no picture (no, the buffer ic's not shorted). Then after 2-3 restart it started doing like...

Re: New Members - please post your introductions here

Hi fellow repairmans!