A question about LCD TV's - RC-Monster Forums

crazyjr · **A question about LCD TV's -** 06.21.2010, 09:58 PM

I know this is not a tech forum for this, but similar questions have been asked before. Last year my sister bought a sanyo LCD 48" TV, It has been a great TV but today it did something wierd. According to my bro in law, he turned it on and it showed only half a picture, It wasn't overheating, because it had only been running an hour that morning for kids cartoons. When it was turned on later it was OK, no sign of anything wrong, they continued to run it just to see if it would do it again, but nothing. To anyone with LCD experience, What caused this problem? And, Is it a sign of a failing product? Hate to think, after a year, this product is failing and in need of repair

sikeston34m · 06.21.2010, 10:55 PM

Quote:

Originally Posted by crazyjr

I know this is not a tech forum for this, but similar questions have been asked before. Last year my sister bought a sanyo LCD 48" TV, It has been a great TV but today it did something wierd. According to my bro in law, he turned it on and it showed only half a picture, It wasn't overheating, because it had only been running an hour that morning for kids cartoons. When it was turned on later it was OK, no sign of anything wrong, they continued to run it just to see if it would do it again, but nothing. To anyone with LCD experience, What caused this problem? And, Is it a sign of a failing product? Hate to think, after a year, this product is failing and in need of repair

The actual "picture" of a LCD TV appears in a thin semi transparent layer. This layer does not emit any light of it's own.

The actual light is behind this, in the form of a series of small diameter flourescent tubes.

Inside your TV, there is a "starter"/management circuit for the backlighting. It sounds like you had a bad connection for half the backlighting, that was only temporary.

I would say, odds are, it could happen again.

TexasSP · 06.22.2010, 12:25 PM

I would agree completely with sikeston on this. This is one of the major advantages of LED back lit TV's and not too mention they are much thinner too.

This would be worth having it looked at and repaired for sure, especially if it was a moderate to higher end model.

crazyjr · 06.22.2010, 06:52 PM

Thank you guys, It has not happened again since. I will make a note about this, if it happens again

sikeston34m · 06.22.2010, 07:16 PM

Quote:

Originally Posted by TexasSP

I would agree completely with sikeston on this. This is one of the major advantages of LED back lit TV's and not too mention they are much thinner too.

This would be worth having it looked at and repaired for sure, especially if it was a moderate to higher end model.

It sounds like you've been into a few of them or at least did your homework.

I have a Polaroid 32" LCD with problems that I've been trying to figure out. These were notorious for blowing the guts out of several capacitors on the power supply. Thus creating symptoms like mine. Blue "power" light comes on, but no sound or picture.

Of course, I opened it up and all the power supply illustrations I could find, do NOT match my power supply.

My Capacitors appear to be intact, as does the voltage coming from the power supply. So I'm unsure and haven't been able to bring myself to throw it away yet. LOL Any ideas?

Thanks for the info on the LED TV's. I can see how that type of construction is going to last longer, use less power and also give off less heat.

TexasSP · 06.23.2010, 12:59 AM

I don't have an answer other than to find a good tv repair shop. They're not as prominent in our throw away society as they once were, but many still exist. There is a rather good one near me although they have taken to repairing other things to keep the business open.

LED's are definitely our future for the time being. The dumbest thing in recent history is our government pushing and mandating fluorescent lights. Old and outdated technology for the most part and about as environmentally unfriendly as a light bulb can get.