Sharp LCD screen noise

[jurgyman]

I have a Sharp LC-32D62U
the screen constantly has a grid of noise
in TV,hdmi4, hdmi5, doesnt matter.

Power board caps look good.
pulled the main board.
Looked for any cold solder joints, couldnt find any.

any advice?

JM

[dick_barton]

Re: Sharp LCD screen noise

With no signal input is the screen clear of noise?

[jurgyman]

Re: Sharp LCD screen noise

It happens no matter what the input selected.

IE, on an hdmi with no signal, see the noise.

[ReeceyBurger123]

Re: Sharp LCD screen noise

Image of Tcon/boards ? Im aware some sharp Tcons are prone to failed bga solder causing similar symptoms or could even be as simple as lose Lvds cable.

[mmartell]

Re: Sharp LCD screen noise

Heat up the main board with a hair dryer.

[102mm]

Re: Sharp LCD screen noise

I had a 52" version with the same issue. it used a different main board though. I baked the main board in the oven and it fixed the issue for about a month. The issue now happens when you first turn he TV on but eventually goes away.

[jurgyman]

Re: Sharp LCD screen noise

what temperature in the oven and how long?

[mmartell]

Re: Sharp LCD screen noise

That's a last resort. Heat it up with a hait dryer first to see if that affects your issue. A hair dryer won't hurt it but an oven surely can.