Thread: Screen shadow

Have seen similar on a Toshiba Regza from the top. No certain how though, the TV is on 24/7 in an air conditioned room.

I have not had it on a big TV but a few times on PC monitors that had been in storage for a long time.
For some reason the moisture likes to collect where it should not and on the way it collects and dissolves dirt, resulting in this smear.
For the monitors it was a simple procedure of taking the metal frame off the panel to get the various foils out.
Marked them for front and up and washed them with soapy water in the bath tub, good rinse with destilled water and let dry.
Some monitors and most likely TV's as well have at least the top foil(s) glued in place, if the foil is tight everywhere but the areas with shadows you know for sure where it is coming from.

Its a bit reminiscent of the problems some CD's were found to have with the foil decaying.
From what I remember, this decay was partly caused by inferior material and the edges of the CD not being properly sealed and moisture entered.
Could this be one of the causes for this shadowing to occur or even the materials used have been found not to have as long a life as first thought.
Everything today is built as quickly and cheaply as possible and as long as it outlast the warranty, that seems to be as good a quality assurance you can get.

It does not matter how careful you clean it, sometime you just got a lemon that is not properly sealed around the screen films.
Without taking it apart there is very little you could do to fix it.

Must be from condensation then I'd say.

Years ago, I picked up a 32" LCD tv that had been left on the footpath under a tree. It was a cold winter's morning and the tree had dropped dew from its leaves onto the TV. I repaired the electrical fault that it had and installed it in my office. Over the next few weeks I observed the water ingress into the screen rise up from the bottom and stop about 3" high. It stayed that way for months so I decided to try something. I wiped the bottom of the screen with a rag very wet with metho hoping it too would suck into the screen and mix with the water.
It did.
At first the water increased to about 4" then over a couple of weeks decreased until there were patches and then soon after totally disappeared. That TV has remained clear.
I was lucky in this case because the dust that was on the TV obviously didn't find its way into the screen else it would have been permanently stained for sure.