Sharp LC-52LE640U Bad Panel?

[Baldrick]

I've got a Sharp LC-52LE640U that flashes 5 fast/2 slow. I've finally gotten half of the screen to work perfectly.

When I disconnected the two ribbon cables from the t-con board to the panel, the blinking stopped. I then plugged one cable back in and I got half the screen working great, but the other half is white. When I plug the other one in, it dies and I get the error again.

Is this definitely a bad LCD panel? Is it worth even thinking about repairing it?

Thanks.

[nuala]

Re: Sharp LC-52LE640U Bad Panel?

12v panel fail is usually either no 12v to tcon or a blown tcon fuse, the voltages look good.

[splitcrete]

Re: Sharp LC-52LE640U Bad Panel?

Try flexing the panel to see if it gets better,or use a hair dryer blown to the t-con ribbon cables. I sounds like a tab bond problem..

[tibimakai]

Re: Sharp LC-52LE640U Bad Panel?

I would look at the tabs, to see if there is any damage there(not tab bonding).
I have a Sony, which had the same symptom and I have found blown tab and panel board in the same spot where they touched each other.

[tom66]

Re: Sharp LC-52LE640U Bad Panel?

If 15V to one of the panel sides is shorted, it could cause a 5-2 code. Bad panel... Maybe worth checking for shorted MLCC on panel which might be fixable.

[Baldrick]

Re: Sharp LC-52LE640U Bad Panel?

Well, something's changed... Now, I no longer have the 5/2 blinks. With the one ribbon cable plugged in, I have the left half of the screen working great. When I plug the second cable in, I get an image on both sides, but the whole screen is faint, flickering, and blotchy.

I noticed too, the when the second cable is plugged in, I get a slight buzz from the tcon board.

tom66, would the MLCC you mention be on the driver board?

Thanks.

[tom66]

Re: Sharp LC-52LE640U Bad Panel?

If by driver you mean the long PCB which extends along the top of the panel, yes.