42LG30 Vetical bars

[tibimakai]

Re: 42LG30 Vetical bars

Try complaining that the T-con board it's not good, they may send you another one.

[Mr Bill]

Re: 42LG30 Vetical bars

I'm pretty sure the tcon board is good. I'm getting identical results with both and the odds that both are bad are pretty slim. Plus i only paid $13 for the board. After i mail it back i'm only going to see maybe $8. If the board was $50 then that would be a whole different story.

[tibimakai]

Re: 42LG30 Vetical bars

I had a 42LG70 not to long ago with different issue, keep blowing fuses and I got tired of wasting time with it and I have just ordered another PS board and installed it and sold it.
Normally I should have compare them and find the bad component and try to salvage that bad board, but I was sick if it and I didn't care anymore.
I'm almost in the same situation with an LED Sharp 40LE810. Nobody can help me with it, the mainboard is at least $156. PS I have ordered and replaced with same results. They took back the board and I have got my money back, except the shipping fee.
How much is the mainboard?

[tom66]

Re: 42LG30 Vetical bars

I should point out that fading lines are almost always not due to the main board. This is because the main board processes video (typically top left to bottom right) with digital information only. Ones and zeros. In 8, 10 or 12 bit chunks. Such slow, and clearly imperfect fading, can only occur on the panel side, or if the T-con sends bad data to the panel. Maybe if I get the free time I will write a guide on diagnosing Panel vs. Main but there's only a few things to look for.

[Mr Bill]

Re: 42LG30 Vetical bars

Here is an update.
I still can't change sources to see if audio is present whether with the RS232 cable or the OEM remote. I was looking at the main board wanting to throw it when i noticed something. There were a few markings made in ink over on the right side of the board. I've seen this type of writing on boards that mainly come from ebay or any tv chop shop. It made me wonder.........

The main board that is in this tv right now is for a 42LG30.AUSTLJM.
The Tv itself is a 42LG30.BUSTLJM.

So it would appear the main board has been swapped for whatever reason and done with the wrong board. Now i've seen incompatible main boards do a negative image. Could it be a plausible explination for the washed out bars and no control over the keyboard except for the on/off which btw takes longer than one would expect to power on?

[is_it_a_bird]

Re: 42LG30 Vetical bars

Dont know if it is of any use but I have just seen this LG on flebay, looking at the screen it looks very similar to the problem you have....but sorry to say in the description it says damaged screen :o(

http://www.ebay.co.uk/itm/Lg-led-tv-...item3a7ef025d1

[tom66]

Re: 42LG30 Vetical bars

I recently came across a 32" Samsung with vertical multicoloured bars and one of the tab drivers had burnt itself completely out -- so panel was bad.

https://www.badcaps.net/forum/attach...3&d=1359064167

[Mr Bill]

Re: 42LG30 Vetical bars

Well i manned up and bought the correct main board. I am happy to announce the tv is working correctly. The standby led only blinks 1-2 times then the backlights come on. My friend scrapped this project a couple weeks ago since he didn't want to gamble the $90 for the main board. This will be wall mounted in my dining room since it has no base.

Thanks to all for your opinions.
I got very lucky on this one.

[budm]

Re: 42LG30 Vetical bars

Thanks for posting the result, next time I see this symptom it will help me in the future.