Just how common are dead pixels...

evanzo · 29-09-2008, 19:48

...on premium brand TV's? Let say a 32" panel with a resolution of 1366x768. I would expect that having a much lower pixel density than say a 15" panel of similar resolution would mean it would be less likely that there would be pixel faults. Anyone have any good idea just how common a problem this is now?

Nigel Goodwin · 30-09-2008, 13:02

Quote:

Originally Posted by evanzo

...on premium brand TV's? Let say a 32" panel with a resolution of 1366x768. I would expect that having a much lower pixel density than say a 15" panel of similar resolution would mean it would be less likely that there would be pixel faults. Anyone have any good idea just how common a problem this is now?

They are really pretty uncommon, and as an engineer I happily replace panels in Sony sets for a single dead pixel - it's a premium product, at a premium price, and shouldn't have any defects.

All faulty panels have to be returned to Barcelona for examination, and they have never yet rejected a warranty claim for dead pixels.

This isn't likely to apply to lesser makes though.

ray_01 · 30-09-2008, 13:20

Forgive my ignorance but what is a dead pixel?
Would I know if I had one? (my tv that is).
Many thanks
Ray

GaryB · 30-09-2008, 13:25

Quote:

Originally Posted by ray_01

Forgive my ignorance but what is a dead pixel?
Would I know if I had one? (my tv that is).
Many thanks
Ray

A dead pixel is one that isn't working correctly. They can be constantly off, constantly on, or (more rarely) flickering or flashing. If you haven't noticed any so far, you're probably better off not looking.

ray_01 · 30-09-2008, 13:42

Quote:

Originally Posted by GaryB

A dead pixel is one that isn't working correctly. They can be constantly off, constantly on, or (more rarely) flickering or flashing. If you haven't noticed any so far, you're probably better off not looking.

Thanks GaryB. for your quick reply.
Does anyone have a picture of one?
Many thanks
Ray.

GaryB · 30-09-2008, 13:46

Here are a couple of dark ones:

http://www.jasondunn.com/dell-dead-pixel-again-241

http://www.digitalalchemy.tv/2007/06...d-monitor.html

Waj_100 · 30-09-2008, 19:59

Quote:

Originally Posted by Nigel Goodwin

They are really pretty uncommon, and as an engineer I happily replace panels in Sony sets for a single dead pixel - it's a premium product, at a premium price, and shouldn't have any defects.

All faulty panels have to be returned to Barcelona for examination, and they have never yet rejected a warranty claim for dead pixels.

This isn't likely to apply to lesser makes though.

That is very impressive service!

As you know, Pioneer is a high end make of TV, but in my instruction manual it states that stuck or dead pixels are normal and not covered by warranty.

I hope I never get one to test the resolve of John Lewis where I bought mine from.

GaryB · 30-09-2008, 22:15

Quote:

Originally Posted by Waj_100

That is very impressive service!

As you know, Pioneer is a high end make of TV, but in my instruction manual it states that stuck or dead pixels are normal and not covered by warranty.

I hope I never get one to test the resolve of John Lewis where I bought mine from.

Although all manufacturers have a specification that allows for a certain number of bad pixels, most of the decent manufacturers will usually replace a screen or swap the set if the customer complains of faulty pixels.

evanzo · 30-09-2008, 22:23

Some people don't mind having the odd dead pixel but personally once I know it's there all I ever see is that defect,

chrisbartley · 30-09-2008, 23:12

Quote:

Forgive my ignorance but what is a dead pixel?

http://en.wikipedia.org/wiki/ISO_13406-2

steveOooo · 30-09-2008, 23:55

my ipod video 5th gen thats 2.2 years old developed around 6-8 dead pixels on video playback right in the centre! so theres technicolour (well mostly green, the red and blue) pixles blinking away - not bothered as its a small screen. I think once one goes, your likely to see more pop up sooner rather than later.

Nigel Goodwin · 01-10-2008, 11:40

Quote:

Originally Posted by Waj_100

That is very impressive service!

As you know, Pioneer is a high end make of TV, but in my instruction manual it states that stuck or dead pixels are normal and not covered by warranty.

I think Sony instructions probably say the same, but I don't consider it acceptable for a premium product, and I wouldn't for a Pioneer either.

This is the advantage of doing the service yourself, I know damn well a third party Sony service company wouldn't do so.

evanzo · 09-10-2008, 13:04

Typical. I got my 32" bravia and guess what, 4 stuck pixels. All in the centre of the screen too. It has been returned to Comet and I have another one coming. I do seem to have awful luck with LCD TV's. Every single one i have owned has had a least one pixel defect. I'd like to tihnk my next bravia will be pixel perfect, but that it very unlikely. How is it I can get a latop which costs £300 total that includes a screen with almost the same resolution as a 32" LCD without dead pixels(never had a dead/stuck pixel on a laptop dispplay)? yet a panel with half the pixel density is almost guaranteed to have faults?

Nigel Goodwin · 09-10-2008, 14:31

Quote:

Originally Posted by evanzo

Typical. I got my 32" bravia and guess what, 4 stuck pixels. All in the centre of the screen too. It has been returned to Comet and I have another one coming. I do seem to have awful luck with LCD TV's. Every single one i have owned has had a least one pixel defect. I'd like to tihnk my next bravia will be pixel perfect, but that it very unlikely. How is it I can get a latop which costs £300 total that includes a screen with almost the same resolution as a 32" LCD without dead pixels(never had a dead/stuck pixel on a laptop dispplay)? yet a panel with half the pixel density is almost guaranteed to have faults?

We sell a LOT of Sony BRAVIA's and it's very rare to see a dead pixel - I don't think I've changed a panel for one this year?.

Orbitalzone · 10-10-2008, 19:18

I don't think it's fair to say it's common to expect dead pixels on a Sony.... you can be unlucky (and you were!) but many many others rate Sony's and it seems rare to get pixel problems.

skinj · 10-10-2008, 21:47

We sell a lot of LCD's from Panasonic and have only seen 1 dead pixel on a new set all the time we've sold them. We have however seen several on JVC, Hitachi & Grundig sets. Have never seen any on the few Sony LCD's we've sold or had back in for other repair work.

misterbarlow · 12-10-2008, 15:33

My 32" is from Evesham which I believe is a rebranded Tatung panel, so as cheap as you can probably get.
Its 2 years old this month and got none at all so far...
Recently bought a new 19" monitor for the PC and had 3 show up within a month....

evanzo · 13-10-2008, 23:26

Quote:

Originally Posted by misterbarlow

My 32" is from Evesham which I believe is a rebranded Tatung panel, so as cheap as you can probably get.
Its 2 years old this month and got none at all so far...
Recently bought a new 19" monitor for the PC and had 3 show up within a month....

I have heard that when demand for panels is very high that more of the panels that would normally get sold off the generic brands are retained for use by Samsung/Sony. So the junk they would usually offload on the cheapo makes ends up in one of their products

stvn758 · 18-10-2008, 20:17

I have one on my sharp 17in PC monitor, was a little annoyed at first, but I never gave it much thought after that as it was in the corner out the way.

29-09-2008, 19:48	#1
evanzo Forum Member Join Date: Oct 2005 Location: Leeds Posts: 199	Just how common are dead pixels... ...on premium brand TV's? Let say a 32" panel with a resolution of 1366x768. I would expect that having a much lower pixel density than say a 15" panel of similar resolution would mean it would be less likely that there would be pixel faults. Anyone have any good idea just how common a problem this is now?

30-09-2008, 13:02	#2
Nigel Goodwin Forum Member Join Date: Apr 2006 Location: North Derbyshire Posts: 41,789	Quote: Originally Posted by evanzo ...on premium brand TV's? Let say a 32" panel with a resolution of 1366x768. I would expect that having a much lower pixel density than say a 15" panel of similar resolution would mean it would be less likely that there would be pixel faults. Anyone have any good idea just how common a problem this is now? They are really pretty uncommon, and as an engineer I happily replace panels in Sony sets for a single dead pixel - it's a premium product, at a premium price, and shouldn't have any defects. All faulty panels have to be returned to Barcelona for examination, and they have never yet rejected a warranty claim for dead pixels. This isn't likely to apply to lesser makes though.

30-09-2008, 13:20	#3
ray_01 Forum Member Join Date: Jun 2007 Posts: 411	Forgive my ignorance but what is a dead pixel? Would I know if I had one? (my tv that is). Many thanks Ray

30-09-2008, 13:25	#4
GaryB Forum Member Join Date: Jun 2002 Location: St Albans Posts: 4,088	Quote: Originally Posted by ray_01 Forgive my ignorance but what is a dead pixel? Would I know if I had one? (my tv that is). Many thanks Ray A dead pixel is one that isn't working correctly. They can be constantly off, constantly on, or (more rarely) flickering or flashing. If you haven't noticed any so far, you're probably better off not looking.

30-09-2008, 13:42	#5
ray_01 Forum Member Join Date: Jun 2007 Posts: 411	Quote: Originally Posted by GaryB A dead pixel is one that isn't working correctly. They can be constantly off, constantly on, or (more rarely) flickering or flashing. If you haven't noticed any so far, you're probably better off not looking. Thanks GaryB. for your quick reply. Does anyone have a picture of one? Many thanks Ray.

30-09-2008, 13:46	#6
GaryB Forum Member Join Date: Jun 2002 Location: St Albans Posts: 4,088	Here are a couple of dark ones: http://www.jasondunn.com/dell-dead-pixel-again-241 http://www.digitalalchemy.tv/2007/06...d-monitor.html

30-09-2008, 19:59	#7
Waj_100 Forum Member Join Date: Jan 2007 Location: Lancashire Posts: 3,640	Quote: Originally Posted by Nigel Goodwin They are really pretty uncommon, and as an engineer I happily replace panels in Sony sets for a single dead pixel - it's a premium product, at a premium price, and shouldn't have any defects. All faulty panels have to be returned to Barcelona for examination, and they have never yet rejected a warranty claim for dead pixels. This isn't likely to apply to lesser makes though. That is very impressive service! As you know, Pioneer is a high end make of TV, but in my instruction manual it states that stuck or dead pixels are normal and not covered by warranty. I hope I never get one to test the resolve of John Lewis where I bought mine from.

30-09-2008, 22:15	#8
GaryB Forum Member Join Date: Jun 2002 Location: St Albans Posts: 4,088	Quote: Originally Posted by Waj_100 That is very impressive service! As you know, Pioneer is a high end make of TV, but in my instruction manual it states that stuck or dead pixels are normal and not covered by warranty. I hope I never get one to test the resolve of John Lewis where I bought mine from. Although all manufacturers have a specification that allows for a certain number of bad pixels, most of the decent manufacturers will usually replace a screen or swap the set if the customer complains of faulty pixels.

30-09-2008, 22:23	#9
evanzo Forum Member Join Date: Oct 2005 Location: Leeds Posts: 199	Some people don't mind having the odd dead pixel but personally once I know it's there all I ever see is that defect,

30-09-2008, 23:12	#10
chrisbartley Forum Member Join Date: Jul 2002 Location: berks Posts: 1,643	Quote: Forgive my ignorance but what is a dead pixel? http://en.wikipedia.org/wiki/ISO_13406-2

30-09-2008, 23:55	#11
steveOooo Forum Member Join Date: Jul 2004 Location: London Posts: 4,470	my ipod video 5th gen thats 2.2 years old developed around 6-8 dead pixels on video playback right in the centre! so theres technicolour (well mostly green, the red and blue) pixles blinking away - not bothered as its a small screen. I think once one goes, your likely to see more pop up sooner rather than later.

01-10-2008, 11:40	#12
Nigel Goodwin Forum Member Join Date: Apr 2006 Location: North Derbyshire Posts: 41,789	Quote: Originally Posted by Waj_100 That is very impressive service! As you know, Pioneer is a high end make of TV, but in my instruction manual it states that stuck or dead pixels are normal and not covered by warranty. I think Sony instructions probably say the same, but I don't consider it acceptable for a premium product, and I wouldn't for a Pioneer either. This is the advantage of doing the service yourself, I know damn well a third party Sony service company wouldn't do so.

09-10-2008, 13:04	#13
evanzo Forum Member Join Date: Oct 2005 Location: Leeds Posts: 199	Typical. I got my 32" bravia and guess what, 4 stuck pixels. All in the centre of the screen too. It has been returned to Comet and I have another one coming. I do seem to have awful luck with LCD TV's. Every single one i have owned has had a least one pixel defect. I'd like to tihnk my next bravia will be pixel perfect, but that it very unlikely. How is it I can get a latop which costs £300 total that includes a screen with almost the same resolution as a 32" LCD without dead pixels(never had a dead/stuck pixel on a laptop dispplay)? yet a panel with half the pixel density is almost guaranteed to have faults?

09-10-2008, 14:31	#14
Nigel Goodwin Forum Member Join Date: Apr 2006 Location: North Derbyshire Posts: 41,789	Quote: Originally Posted by evanzo Typical. I got my 32" bravia and guess what, 4 stuck pixels. All in the centre of the screen too. It has been returned to Comet and I have another one coming. I do seem to have awful luck with LCD TV's. Every single one i have owned has had a least one pixel defect. I'd like to tihnk my next bravia will be pixel perfect, but that it very unlikely. How is it I can get a latop which costs £300 total that includes a screen with almost the same resolution as a 32" LCD without dead pixels(never had a dead/stuck pixel on a laptop dispplay)? yet a panel with half the pixel density is almost guaranteed to have faults? We sell a LOT of Sony BRAVIA's and it's very rare to see a dead pixel - I don't think I've changed a panel for one this year?.

10-10-2008, 19:18	#15
Orbitalzone Forum Member Join Date: Oct 2000 Location: Sussex Posts: 12,173	I don't think it's fair to say it's common to expect dead pixels on a Sony.... you can be unlucky (and you were!) but many many others rate Sony's and it seems rare to get pixel problems.

10-10-2008, 21:47	#16
skinj Forum Member Join Date: Nov 2001 Posts: 3,206	We sell a lot of LCD's from Panasonic and have only seen 1 dead pixel on a new set all the time we've sold them. We have however seen several on JVC, Hitachi & Grundig sets. Have never seen any on the few Sony LCD's we've sold or had back in for other repair work.

12-10-2008, 15:33	#17
misterbarlow Forum Member Join Date: Nov 2003 Location: Wales Posts: 561	My 32" is from Evesham which I believe is a rebranded Tatung panel, so as cheap as you can probably get. Its 2 years old this month and got none at all so far... Recently bought a new 19" monitor for the PC and had 3 show up within a month....

13-10-2008, 23:26	#18
evanzo Forum Member Join Date: Oct 2005 Location: Leeds Posts: 199	Quote: Originally Posted by misterbarlow My 32" is from Evesham which I believe is a rebranded Tatung panel, so as cheap as you can probably get. Its 2 years old this month and got none at all so far... Recently bought a new 19" monitor for the PC and had 3 show up within a month.... I have heard that when demand for panels is very high that more of the panels that would normally get sold off the generic brands are retained for use by Samsung/Sony. So the junk they would usually offload on the cheapo makes ends up in one of their products

18-10-2008, 20:17	#19
stvn758 Forum Member Join Date: Sep 2005 Posts: 17,338	I have one on my sharp 17in PC monitor, was a little annoyed at first, but I never gave it much thought after that as it was in the corner out the way.

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Just how common are dead pixels...