Toshiba 42rv530u picture problem

[kueberco]

Re: Toshiba 42rv530u picture problem

Possibley a bad driver IC on the panel? Ideas?

[tibimakai]

Re: Toshiba 42rv530u picture problem

You should try twisting the TV's frame, see if it's not a bad tab. On my Vizio I have the same dark spot and by twisting the whole frame came back to normal, nice picture, bright screen.

[selldoor]

Re: Toshiba 42rv530u picture problem

some service menus have mirror image as an option - see if yours has.

if it has perhaps select it then unselect it and see if that fixes it.

[kueberco]

Re: Toshiba 42rv530u picture problem

some service menus have mirror image as an option - see if yours has.

if it has perhaps select it then unselect it and see if that fixes it.

Only does it after fifteen minutes it's on. It's fine when I first turn it on. I just hope the LCD is not going south.

[kueberco]

Re: Toshiba 42rv530u picture problem

You should try twisting the TV's frame, see if it's not a bad tab. On my Vizio I have the same dark spot and by twisting the whole frame came back to normal, nice picture, bright screen.

The twisting tip had no affect, Thanks though.

[kueberco]

Re: Toshiba 42rv530u picture problem

Is it very common for the lcd driver IC's to go bad?

[kueberco]

Re: Toshiba 42rv530u picture problem

Tv sat all night unplugged. Plugged in and turned on. Perfect video for twenty minutes then started the inverted image again. Any ideas?

[tom66]

Re: Toshiba 42rv530u picture problem

Tv sat all night unplugged. Plugged in and turned on. Perfect video for twenty minutes then started the inverted image again. Any ideas?

Try applying a small amount of pressure to the main processors on the main board, and if accessible, the T-con. If the problem appears, it is a BGA problem. If this fails, try using a hairdryer to heat up parts of the TV.

[kueberco]

Re: Toshiba 42rv530u picture problem

Try applying a small amount of pressure to the main processors on the main board, and if accessible, the T-con. If the problem appears, it is a BGA problem. If this fails, try using a hairdryer to heat up parts of the TV.

What exactly is BGA? I've also put pressure on the Ic's on the mainboard and changed to another Tcon -no change. Thanks t0m66

[tom66]

Re: Toshiba 42rv530u picture problem

What exactly is BGA? I've also put pressure on the Ic's on the mainboard and changed to another Tcon -no change. Thanks t0m66

Ball grid array. A type of package for a processor with many pins (typically >300.)

I would then think heating up the main board might help. Otherwise, I'm completely stuck!

[kueberco]

Re: Toshiba 42rv530u picture problem

Ball grid array. A type of package for a processor with many pins (typically >300.)

I would then think heating up the main board might help. Otherwise, I'm completely stuck!

I'll try the heat gun test again this evening. I'll check for the IC. Thanks

[kueberco]

Re: Toshiba 42rv530u picture problem

Found to be a bad tab and driver ic on the right side. Has anyone found a good source to repair LCD panels? Or is it considered scrap? Thanks.

[tom66]

Re: Toshiba 42rv530u picture problem

Found to be a bad tab and driver ic on the right side. Has anyone found a good source to repair LCD panels? Or is it considered scrap? Thanks.

If it's a driver IC, it's essentially impossible to fix it.

But a bad tab bond may be fixable. See here http://www.youtube.com/watch?v=zW998RTAq-0.

[kueberco]

Re: Toshiba 42rv530u picture problem

If it's a driver IC, it's essentially impossible to fix it.

But a bad tab bond may be fixable. See here http://www.youtube.com/watch?v=zW998RTAq-0.

If I press on the small IC's on the tabs my problem goes away. Not having much luck finding a replacement under 2-3 hundred bucks. Guess its time to part it out. Lost on this one

[tom66]

Re: Toshiba 42rv530u picture problem

If I press on the small IC's on the tabs my problem goes away. Not having much luck finding a replacement under 2-3 hundred bucks. Guess its time to part it out. Lost on this one

You can try taking a bumper or spacer and pressing it inside the frame to fix it. This has a ~90% success rate with Sony LCD panels with this problem.

[kueberco]

Re: Toshiba 42rv530u picture problem

Update- I purchased a used panel from a polaroid 42 inch and dissected the tft lcd out of it. I had to make a few modifications but it worked flawlessly until i went to put the top metal retainer on that covers the tft panel boards. Being a slightly different configuration, The little foam pads sit in fifferent location on the boards. Of course they had to be conductive and shorted the op-amp ic's on each side. power was shut down immediatley. NO ONE in the USA sells the 2 chips I need, So I found a supplier in china and ordered them. They should arrive in 15 days. I will keep you posted on the progress. Not giving up yet!