Sony Bravia LCD HDTV developed dark spot on bottom right corner of screen.

[Shawn]

Does anyone know what could cause this:

It is a 40" Sony Bravia from 2008. It looks like maybe one of the backlights went out, but I'm not sure. Some google searching say it could be the inverter? I believe the inverter could be replaced but I don't know about a backlight. I replaced one on an old laptop before and it was a pain. The laptop only had one however. Don't really want to replace the TV right now as if I were going to get a new one I'd get a 4K TV though I can't afford one currently.

 

[postmortemIA]

I don't think it is back light, it should be horizontal, not vertical. See here reference:
http://en.wikipedia.org/wiki/Liquid-crystal_display#mediaviewer/File:LCD-TV_Backlight_with_CCFL.jpg

My monitor has similar problem, and from what I've seen online, it is permanently damaged due to overheating:
http://forums.anandtech.com/showthread.php?t=2404213

 

[Shawn]

That really sucks. I've been doing a lot of searching and it seems like it's either the panel or the tcon board, but probably the panel. Paid $1100 for this TV back in 2008. It's old, but for that much money you'd expect it to last longer. :\

 

[DesiPower]

I have a 46" Bravia back from 2008 too and about 2 years back it developed 2 horizontal line very close to each other, probably 1 pixel apart, about 1 inch from the left side of the TV, almost like dead pixels. They are seen 90% of the time and change color between blue and green. I dont think my next TV will be Sony.

 

[bradly1101]

I hate to say it but I've never owned a Sony product that didn't die an early death going back to my Walkman in the '80's.

Nothing seems like it's built to last anymore. I recently retired a CRT TV which was still working fine after seventeen years. A friend had a similar experience. They were made by Philips, so that's what I got for an HDTV too. So far so good but it's pretty new.

 

[RossMAN]

Why did I read this thread?

/also owns a Sony HDTV from 3 years ago.

I do have the 1 year manufacturer warranty and purchased SquareTrade 5 yr from CostCo.

 

[pcgeek11]

Are you sure it is an CFL lighted backlight and not LED? Sony Bravias did come with edge lighted LED models such as: KDL42EX440. It could be a defective LED or even a cable loose blocking the light.

 

[Drako]

Are you sure it is an CFL lighted backlight and not LED? Sony Bravias did come with edge lighted LED models such as: KDL42EX440. It could be a defective LED or even a cable loose blocking the light.

That's what it looks like to me - edge lit backlight string failure.

 

[Shawn]

It is a KDL-40V2500. It's actually a 2007 model. I don't think they had LED backlighting back then.

 

[Drako]

It is a KDL-40V2500. It's actually a 2007 model. I don't think they had LED backlighting back then.

OK, wow, a 2007. Yep, probably a CFL backlight.

An 8 year old Sony TV.:hmm:

It's far exceeded its Sony expected lifetime. Buy a new TV.

 

[pcgeek11]

Get a new TV. You can get twice the TV for half what you paid.

 

[Shawn]

True, but I can probably live with it for now. I had a Dell LCD that I bought in 2004 that was still working when I sold it last year. To be fair, I did have to repair the power board 2 years ago. Cost me $4 in parts. Was hoping I could fix this one too.