Re: LG 42LH3000-ZA LCD TV Screen Issue

I attempted the tab bond fix on this model (different symptom) and it only lasted a few days. I never have managed to exactly locate the problem.

Re: LG 42" LCD (42LH3000) T-Con/tab bond problem?

One more piece of information which might mean something: There are two flat cables which run from the T-con board to another two boards which then feed the two halves of the panel; if I leave either of these two cables disconnected I get half the picture (obviously) but the fault persists regardless of which side is disconnected.

Is this indicative of anything useful, or are the tab bonds on the disconnected side still part of the circuit?


Thanks

Re: LG 42" LCD (42LH3000) T-Con/tab bond problem?

Well, this worked for a couple of weeks but it has failed again. So I opened it up expecting to have better luck locating the fault - unfortunately that has not been the case. No matter what I do, I am unable to track down the problem. I have been over all of the tabs several times and found nothing to indicate that there's anything wrong with any of them. So I'm inclined to think, sadly, that it's probably the panel itself - unless anyone has any other suggestions?

Landfill....

Re: LG 42" LCD (42LH3000) T-Con/tab bond problem?

Just thought I should update this thread for the benefit of others.

Having held on to this television for the better part of a year - and even though I had investigated the tab bonds several times without identifying a problem - I decided to go ahead and add some foam pads under the tab bonds (the metal frame already had factory-fitted blocks)...and it worked!

Videos of this problem generally show the display problems resolving when the faulty bond is touched but this was not the case for me. It...

Re: Lg 42lh3000

I have been holding on to the same model with a different fault. It may not be worth the effort but if you want to send me the board I'd be happy to test it in my set - if it exhibits the same fault that you see then we'd know the board was bad.

Re: LG 42" LCD (42LH3000) T-Con/tab bond problem?

It [I]is[/I] an AUO panel (T420HW04) and AUO control board - if I'd bought this TV I wouldn't feel in any way lucky! This television is only 2 years old and was used in an office video conference system, so it's not like it has had a hard life.

I don't see a chip with those identifications. There are two square ICs: the main one is AUO 12401, and a smaller one, RM5101.

Can't really bring myself to spend money on a replacement board when the panel's in doubt. I may give the control board a blast...

Hello all

While this is probably not a "bad caps" problem I thought I'd post here since there are many other threads on this topic.

Buoyed by my success with repairs to LCD monitors, I have been on the lookout for a faulty LCD TV to play with. Last week I was lucky enough (or so I thought) to acquire a 42" LG (42LH3000-ZA) with what I was told had been an intermittent fault which had becoming more frequent. I had hoped it would something nice and simple like dodgy power supply capacitors, sadly that does not appear to be the case.

The...