LG smart tv 65UH6030 4k No picture

[xfox]

Hello, need some ideas on fixing tv, so got tv with no picture, checked ceramic caps in lcd, found one bad, replaced, got picture back, in some time no picture again, checked all caps, looks good, when I disconnect tcon, turn on tv, and plug in tcon, picture is ok, and running with no issues, trued different tcon, same symptoms. any ideas on that?

[nomoresonys]

Re: LG smart tv 65UH6030 4k No picture

Did you try a factory reset? if that don't work try a firmware update if you didn't already.

[xfox]

Re: LG smart tv 65UH6030 4k No picture

Yeah, tried upgrade, tried reset

[nomoresonys]

Re: LG smart tv 65UH6030 4k No picture

Wonder if something got borked up on the mainboard, eeprom/spi/nand?

[xfox]

Re: LG smart tv 65UH6030 4k No picture

TV fixed, there was one bad mosfet (12V T-Con line) on main board (was giving 7.8V in standby), after replacement TV is back to life

[nomoresonys]

Re: LG smart tv 65UH6030 4k No picture

Nice fix, glad to hear it, another save.

[jason123]

Re: LG smart tv 65UH6030 4k No picture

Not sure why these LCD panel tabs caps keep failing. I found one on mine that's on a 16V rail that fails. All the output voltages on the TCON were 0V, when that 1/4 section of the tabs was connected. Luckily only a handful of caps to try and I got lucky too. TV is up and running.