42lg3000-za

[sordids999]

hello guys

got this set today works fine for a 20 minutes then screen goes totally white but i still have sound,i know these models are prone for panel failure and tab bonds but could there be a chance its Tcon ?
one thing i would say if i twist the screen slighlty when picture is fine the picture does freeze but comes back

thanks ill post pictures later

[tom66]

Re: 42lg3000-za

Twisting and it going bad does point to tab bonds...
You could also try checking gamma voltages on the T-con board.

[sordids999]

Re: 42lg3000-za

ok ill check them and post back the results
thanks

[tom66]

Re: 42lg3000-za

Try checking them both with it working & then with it not.

[sordids999]

Re: 42lg3000-za

GAMMA 22 0.39 GAMMA 21 0.54
GAMMA 17 3.38 GAMMA 16 3.98
GAMMA 15 4.24 GAMMA 13 7.28
GAMMA 12 6.86 GAMMA 11 7.43
GAMMA 10 9.77 GAMMA 8 10.56
GAMMA 7 15.34 GAMMA 6 15.36
GAMMA 2 1.61 GAMMA 1 0.15

The thing thats concerned me once i turned tv on to check gamma voltages the picture came on but was scrolling downwards slowly maybe it is a panel fault as well

[Moreno83]

Re: 42lg3000-za

I fixed a 32lg3000 yesterday so if you need help with the voltages what they should be let me know!

[tom66]

Re: 42lg3000-za

I'm thinking you could have both yes. The gamma voltages are bad.

[Moreno83]

Re: 42lg3000-za

Hmm just see its a 42, prob diff voltages?

[tom66]

Re: 42lg3000-za

If T-con boards are the same it would be ok to compare gamma voltages, usually not necessary though, as you can look at the gamma curve instead.

[sordids999]

Re: 42lg3000-za

yeah thanks guys 99% sure its the panel as well maybe ill strip it

thanks guys

[tom66]

Re: 42lg3000-za

Amazing how many bad LCD panels there are :/