Question about Sharp Aquos LC-32D40U Television
LCD flat screen picture will run for 20-30 minutes and then no picture. Sharp LC 32D40U 2 years old.Sound live and channels will change (no channel indicators)
Had the same problem and glad I found this site. Picture would go black, but sound and faint image would still be on the screen if you looked real close. We keep thinking we pushed a wrong button on the remote and changing a setting.
Took the back of the set off and a little 3 or 4 wire connector was basically unplugged near the power input. Plugged it back in, put on the cover and back in business.
Thanks for the helpful posts. The economy is bad, but a dead TV is worse!
Posted on Sep 15, 2009
Commentor on March 07, 2008 seems to have the fix. My LC-32d40u has had the same problem for a year now. To temporarily fix it, I turn off the TV and Bang the back of it really hard. Then turn it back on and it will work again for a few more hours. Which basically creates friction on the contact points and creates a better connection. I opened up my TV today to try cleaning the contacts as mentioned above. The "ground points" where the inverter board met the plate, as the commentor mentioned on Mar 07, 2008, were worn out and turned from a silver to a black on those spots. This is probably due to me banging the TV and creating friction that rubbed some material off the plate.
I put the tv back together and it turned on okay. Will have to check next couple days to make sure, but this is probably the reason for this problem, not overheating. I do not think a new inverter board needs to be replaced since it seems to be only a temporary fix of a few months from other commentors. Changing out the inverter board probably creates better contact temporarily and so fixes it sometimes or maybe just temporarily depending on luck.
Posted on Dec 02, 2008
Try shining a very bright flashlight on the screen. Can you see the image (but VERY VERY dark)? If so, either the inverters or lamps are bad, which are only sold with the LCD Panel as an assembly, which is VERY VERY expensive. Suggest getting a new TV. The LC32D40U was a bad model.
Posted on Mar 14, 2008
My 32D40U would turn on for 5-10 seconds (Please Wait would appear) and the screen would go black. Sound Normal. It would also sometimes do this after running 5-10 minutes. I read somewhere that the inverter board would come loose and lose proper ground. I took the set apart, removed the board, and cleaned up the grounding points. I reassembled using some copper paste on the ground points and LockTite on the screws. I used some contact cleaner on all the connectors going to the board. I noticed two cables that are covered with copper shield tape where too tight at their connectors and repositioned the tape to give them some slack. The problem hasn't occurred since the fix.
Posted on Mar 22, 2008
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