Re: Sharp Aquos LC-26D40U display issue

hoadle-

You were exactly right! I did as the thread instructed and it worked like a charm!

Thanks sincerely for your help.

Re: Sharp Aquos LC-26D40U display issue

Could you clarify what mean by "Video Board"? Aside from the T-con the only other boards are the scaler, the input board, the mainboard and the inverters.

Re: Control Board Failure

On replacing the transistor:



Yes, BUT transistors with the MPS prefix are Darlington-emitter transistors. Kind of like two transistors in one and provides very high, stable hfe. As the MPSA06 is easy to find, I would go back with that. Otherwise, ensure that whatever replacement you use is also Darlington. A regular general purpose NPN won't work or at least won't work well.

As for the resistor, how sure are you the value was 65/67 ohms? (BTW- the difference between 65 and 67 ohms wont matter to that transistor)...

Greetings-

I have a Sharp Aquos LC-26D40U purchased new in December 2007 (warranty expired). Recently it began this: When turned on, the picture is fine and everything operates as it should. After a few minutes, the screen begins acting up as seen in the photos below. At first, if you turn it off for a few minutes and then turn back on, the screen returns to normal until it warms back up again. Obviously something heat related.

With the nature of the problem, I suspected and replaced the T-CON board, but that didn't work. I also cleaned and tightened all ribbon cables...