LG 55LS4500 T-con weird diode reading

[Nick's Tvs]

Tv turns on, back-light is on, sound works, but no picture.
12 volt to T-con is good, fuse on T-con is good.
There are 2 large black surface mount diodes on this T-con, and they are giving me really weird readings. DMM set to diode, I get 0.456 volts or so one way, and then 0.96v the other way on lets call it diode 1. The other aka diode 2 on the left side does similar one way .46 and the other 1.06v.
LVDS we will say is north, both diodes are on west side of board. Diode facing north south is diode 1 and east west diode is diode 2. Both are located next to the square components with 220 written on them
When the tv is on diode 1 has 3.33 volts on one side and 0 the other, and diode 2 has 11.8 volts on both sides.

I have tried disconnecting the east ribbon turning the set on, and the west side of the tv has vertical lines and east side is just white. Opposite gives me all black screen.
pretty much all pins have 6.97v going to the panel.

Any thoughts or tests?

[chrismurphy]

Re: LG 55LS4500 T-con weird diode reading

My bet is the T-con is faulty ,i would not get too concerned about the diode readings ,if you test no power and they dont show a dead short i would assume that they are ok
The vertical lines you mention i guess that they are even white lines, if so the t-con board is faulty and your best bet is to replace

[Nick's Tvs]

Re: LG 55LS4500 T-con weird diode reading

I replaced the T-con but no difference. I guess its just a bad panel.

[freakaftr8]

Re: LG 55LS4500 T-con weird diode reading

Try one tcon ribbon connected at a time?

[CapLeaker]

Re: LG 55LS4500 T-con weird diode reading

when diodes read weird, take them out for circuit or lift one leg and re measure them again.

[Nick's Tvs]

Re: LG 55LS4500 T-con weird diode reading

freakaftr8
Per original post, yes that's my go to test usually for panel tests.
Its ok I told my customer I was not 100% sure if it was a bad panel and or Tcon and that worst case scenario I just return the board and wouldn't charge him beyond shipping cost.
I placed the new board in the set and no difference. Its just a bummer to have to gut out/recycle these Tvs like this.
Anyway thanks for the input.
Also off topic, but freakaftr8 I can not wait to get a 70" vizio in the shop again with a bad panel. I read that thread a few weeks back and my god I wish I knew about this sooner as I have unfortunately told customers there is nothing that can be done with these.