Re: LG(50LB6000) TV No Picture/Audio, Backlights Lit

Good news everyone, replacing the main board fixed the tv and it is back up and running. Would have been nice to figure out what was broken specifically, but $40 saved me some headache lol

Re: LG(50LB6000) TV No Picture/Audio, Backlights Lit

My next plan of action was to try baking the main board, if that doesn't work then order a new main board. But it looks like we are narrowing it down to that board as the issue so that's good news!

Re: LG(50LB6000) TV No Picture/Audio, Backlights Lit

So when the main board is connected to the power supply these are the pinout voltages I read:

Pin1: GND->GND
Pin2: 12V->12V
Pin3: 12V->12V
Pin4: GND->GND
Pin5: 24V->24V
Pin6: GND->GND
Pin7: 3.5V->3.5V
Pin8: 3.5V->3.5V
Pin9: PWR-ON->3.5V
Pin10: GND->GND
Pin11: N.C->GND
Pin12: 12V->12V
Pin13: GND->GND
Pin14: 24V->24V
Pin15: P-DIM2->3.5V
Pin16: 3.5V->3.5V
Pin17: P-DIM1->0V...

Re: LG(50LB6000) TV No Picture/Audio, Backlights Lit

Thanks for your quick responses. I have attached some photos of the boards. I tried disconnecting the ribbon cable from the main board to t-con board, but the TV is still stuck in the same state. I have heard that heating the board up could fix some bad solder joints, but I was a little bit wary about sticking the board in an oven. I figured the plastic connector sockets would melt.

I will mention I did try heating up the main BGA chip on the main board with a heat gun, but that didn't seem to do anything.
...

Hello Everyone,

I bought a 50" LG TV in July of 2014 model 50LB6000. About 2 weeks ago, I came home to find that the TV is no longer functional. The backlight will turn on when the power is connected, but neither the remote control or manual power button on the TV seem to have any response. The red LED light at the bottom is on. I have already tried replacing the entire power board, but the TV remains stuck in this backlight on state. I have tried both HDMI inputs and there is no response. I have also checked for visible damage(bulged caps, burnt IC's, broken connector pins,...

Re: New Members - please post your introductions here

Hello,

Just joined today because my LG TV has seemed to stopped working about 2 weeks ago...Hoping to get some suggestions on other things to try out. I don't want to throw away a TV if it's something I can fix!