Sony KDFE50A10 LCD TV - are stuck pixels normal?

On 19/9/05 7:28 AM, "John" wrote:

I haven't seen any comments about stuck pixels which is why I'm
wondering if:
(1) I got a rare defective set.

It's rare to have three so soon, but one isn't uncommon.

Is this stuck pixel defect in the LCD screen itself or is there any
chance it might be some tiny specks of dust inside the optics that a
repairman could blow out causing the stuck pixels to go away?

There are no optics in a direct-view LCD set, just a backlight with an LCD
panel in front of it. Pixels (or in your case, subpixels, because they
aren't white) can get 'stuck on', it does happen rather often.

On 20/9/05 1:29 PM, "John" wrote:

It's interesting how it's actually several subpixels all of the same
color because they are more like small uniform color "blotches".


That's different. Are you saying you have multiple adjacent pixels that are
gone? That's definitely a replacement candidate.

--
Tzortzakakis Dimitrios
major in electrical engineering, freelance electrician
FH von Iraklion-Kreta, freiberuflicher Elektriker
dimtzort AT otenet DOT gr
? "John" ?????? ??? ??????
...
I just got a new Sony KDFE50A10 LCD TV. The very first thing I noticed
(and it's my only significant gripe) is that it had 3 noticeable
"stuck pixels" for lack of a better word. In Normal (4:3) mode or when
the screen is black you don't see them, but when there is picture
information these 3 spots show up as stuck blue pixels no matter what
the background color is. One of these spots covers a few adjacent
pixels. At my normal viewing distance (10') I can't see them, but it's
one of those things that bothers me because I know they are there and
they shouldn't be.

Are stuck pixels like this normal on LCD TVs or is this a defect for
which I should exchange this set?

Doesn't that ring a bell?Yes, it's perfectly normal for a LCD or TFT screen
to have dead pixels.That's why some manufacturers give a 0-dead pixel
guarantee, for say, 3 years.I'm always telling to anyone who would care to
listen, that the TFT-LCD technology isn't better than CRT, just because it's
newer.Think of it:in a CRT, you have the cathode rays hitting the dots of
phosphorus and making them light, emitting blue, green, red. The cathode ray
can be easily deflected/accelerated, also manipulated.It's very easy to
construct excellent CRT tubes very cheaply.On the contrary, the LCD/TFT
consists of many pixels, each individually powered and controlled, so the
chances of failure are high, considering the million of pixels making a
screen, while the CRT only fails completely to display, if some of the three
cathode rays fails (blue/green/red) or usually the flyback transformer or
the anode voltage transformer.





didn't use the right words when searching the net about this.

Is this stuck pixel defect in the LCD screen itself or is there any
chance it might be some tiny specks of dust inside the optics that a
repairman could blow out causing the stuck pixels to go away?

sony model mentioned is a rear projection not true LCD

Dimitrios Tzortzakakis wrote:
--
Tzortzakakis Dimitrios
major in electrical engineering, freelance electrician
FH von Iraklion-Kreta, freiberuflicher Elektriker
dimtzort AT otenet DOT gr
? "John" ?????? ??? ??????
...

I just got a new Sony KDFE50A10 LCD TV. The very first thing I noticed
(and it's my only significant gripe) is that it had 3 noticeable
"stuck pixels" for lack of a better word. In Normal (4:3) mode or when
the screen is black you don't see them, but when there is picture
information these 3 spots show up as stuck blue pixels no matter what
the background color is. One of these spots covers a few adjacent
pixels. At my normal viewing distance (10') I can't see them, but it's
one of those things that bothers me because I know they are there and
they shouldn't be.

Are stuck pixels like this normal on LCD TVs or is this a defect for
which I should exchange this set?


Doesn't that ring a bell?Yes, it's perfectly normal for a LCD or TFT screen
to have dead pixels.That's why some manufacturers give a 0-dead pixel
guarantee, for say, 3 years.I'm always telling to anyone who would care to
listen, that the TFT-LCD technology isn't better than CRT, just because it's
newer.Think of it:in a CRT, you have the cathode rays hitting the dots of
phosphorus and making them light, emitting blue, green, red. The cathode ray
can be easily deflected/accelerated, also manipulated.It's very easy to
construct excellent CRT tubes very cheaply.On the contrary, the LCD/TFT
consists of many pixels, each individually powered and controlled, so the
chances of failure are high, considering the million of pixels making a
screen, while the CRT only fails completely to display, if some of the three
cathode rays fails (blue/green/red) or usually the flyback transformer or
the anode voltage transformer.





didn't use the right words when searching the net about this.

Is this stuck pixel defect in the LCD screen itself or is there any
chance it might be some tiny specks of dust inside the optics that a
repairman could blow out causing the stuck pixels to go away?

JoJo wrote:
sony model mentioned is a rear projection not true LCD

That's probably why each defect looks like more than a single pixel.
I've got one white pixel that is noticeable only on a black screen on my
computer screen. I think of it as having only one bad artifact out of
hundreds of thousands of pixels.

Live with it. Stay ten feet back.

Bill