52" Sharp Aquos LCD White Dots

[RCFLYER]

I have a 52" Aquos LC60C52U LCD The problem is it has white Dots, like a snow storm on the screen? What can be causing this, and can it be repaired?
Attached is a picture of what it looks like.

[Mr Bill]

Re: 52" Sharp Aquos LCD White Dots

I just replaced the main board on my wife's parents 52D62U and this is what the screen looked like. It could be the tcon board. Is the fuzz in the menu screen?

[tom66]

Re: 52" Sharp Aquos LCD White Dots

It looks like T-con, assuming this is a Sharp with a separate T-con...

[RCFLYER]

Re: 52" Sharp Aquos LCD White Dots

When I pressed on the mian board I was able to make a large persentage of the dots go away. I took the main board off and with a magnifying glass looked at most of the components (and there are many tiny ones) but I didn't see anything obvious and finding a cold solder joint on those is going to be virtually impossible. So I put it all back together and turn on the TV. The dots were 99% gone but then came back after a minute. I put pressure on this metal tab to flex the board and in doing so, it was not all the way in place (seems like some sort of grounding tab but not screwed down just snapped in place) and then the picture went perfect – for now.
Attached is a picture

[cashkennedy]

Re: 52" Sharp Aquos LCD White Dots

Might want to check all your cables, like the lvds cable and ribbon cables to make sure theyre not what is being flexed when you push on the main board.

[budm]

Re: 52" Sharp Aquos LCD White Dots

Alot of board grounding depends on the circuit board mounting holes with ground pads to ground the circuit grounds to the chassis, so it may be good idea to tighten up the PCB mounting screws on all the board.

[cashkennedy]

Re: 52" Sharp Aquos LCD White Dots

this post was not meant for this thread lol >.> sorry just ignore this spot