Pixel policy

On Sun, 3 Feb 2008 11:19:59 UTC, "tpow" wrote:

is there one for new LCD TV's

I bought new Toshiba 40XF355 which was delivered on Friday and gained one
hot pixel over the weekend.

I have asked the suppliers customer service to comment.

I have no idea if this is true or not, but I recall reading somewhere
that they can sometimes be fixed by gently massaging the screen.

--
Regards
Dave Saville

NB Remove nospam. for good email address

"Andy Burns" wrote in message
...
On 03/02/2008 13:55, tpow wrote:

"Andy Burns" wrote
ISO 13406-2

that's not exactly public domain when researching and ordering a TV
though............

Equally it's not a state secret, just a bit of research before a purchase

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

Most manufacturers will specify Class II, so for a 1920x1080 pixel set,
that equals 4 dead pixels and 4 hot pixels and 10 stuck pixels (of which 4
could be adjacent) before it would be considered sub-standard.

it may not be a state secret but I bet 99.99% of buyers are not even aware
or made aware that this problem exists..............until they see them on
their screen.

should the seller not advertise this fact and should the manufacturer not
include it in the spec sheet on Toshibas web and in the
handbook..............it is in neither as far as I can see.

"Dave Saville" wrote in message
news:[email protected]
On Sun, 3 Feb 2008 11:19:59 UTC, "tpow" wrote:

is there one for new LCD TV's

I bought new Toshiba 40XF355 which was delivered on Friday and gained one
hot pixel over the weekend.

I have asked the suppliers customer service to comment.

I have no idea if this is true or not, but I recall reading somewhere
that they can sometimes be fixed by gently massaging the screen.

--
Regards
Dave Saville

NB Remove nospam. for good email address

for computer LCD panels there is a piece of software that attempts to fix
some problems............http://www.jscreenfix.com/basic.php

but again all refs are aimed at LCD panels for computer applications and not
TV's. Even though they are much the same beast.

dj

On 03/02/2008 16:28, tpow wrote:

I bet 99.99% of buyers are not even aware
or made aware that this problem exists..............until they see them on
their screen.

that is an issue

should the seller not advertise this fact and should the manufacturer not
include it in the spec sheet on Toshibas web and in the
handbook..............it is in neither as far as I can see.

that would be helpful wouldn't it?

In message , Mark Carver
wrote


For pixel defects in broadcast TV cameras, a zone system is used, with
minimum, or in most cases zero tolerance of defects within a central
circle.
Defects are allowed at the edges and corners. IS0 13406-2 doesn't seem
to apply that criteria ?

Detector (pixel) defects in cameras can usually be detected and the
picture cosmetically masked where they occur by replacing the content
from neighbouring detector elements.

Dead pixel elements on displays cannot be masked in the same way as by
definition they are not controlled by the display electronics.

--
Alan
news2006 {at} amac {dot} f2s {dot} com

tpow wrote:
"Dave Saville" wrote in message
news:[email protected]
On Sun, 3 Feb 2008 11:19:59 UTC, "tpow" wrote:

is there one for new LCD TV's

I bought new Toshiba 40XF355 which was delivered on Friday and gained one
hot pixel over the weekend.

I have asked the suppliers customer service to comment.
I have no idea if this is true or not, but I recall reading somewhere
that they can sometimes be fixed by gently massaging the screen.

--
Regards
Dave Saville

NB Remove nospam. for good email address

for computer LCD panels there is a piece of software that attempts to fix
some problems............http://www.jscreenfix.com/basic.php

but again all refs are aimed at LCD panels for computer applications and not
TV's. Even though they are much the same beast.

dj


I think that this whole business of dead pixels is a manufacturer
cop-out. In essence, they can't guarantee that the panel yield will
always be 100% so fob the would-be customer off with a threshold that in
theory lets them off the hook. Sorry, but that's a crock. The Sale Of
Goods covers you here - it's not of merchantable quality if it has dead
pixels, period. When I purchased my Sony 42-plasma some years ago it had
a pixel stuck on green towards the middle of the screen - you saw it all
the time - you couldn't miss it - on other colours it looked bright
white (dunno why). My dealer swapped the panel without question. If,
when I buy a new panel it has the same fault it will go back. Would you
buy brand new car with a scratch down side - "Sorry guv, it's
manufacturing tolerance" - of course not - plasmas and LCDs are no
different. Providing that you buy on a credit card (or finance agreement
if you must) you have some redress even if the supplier won't help.

In my experience, dead pixels are few and far between nowadays. I can't
recall the last time that I saw a new PC LCD screen with a dead pixel,
for example. I can accept that pixels can die after a number of years -
that's OK, but irritating, but dead pixels on new kit: no, 0/10, must
try harder.


Clem

From those I know with eyes, I'm told its very rare to get a duff pixel and
could point to the set having been mishandled. You start with one dead
pixel, and the effect spreads vertically for some reason.

I'd send it back.

Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"Clem Dye" wrote in message
...
tpow wrote:
"Dave Saville" wrote in message
news:[email protected]
On Sun, 3 Feb 2008 11:19:59 UTC, "tpow" wrote:

is there one for new LCD TV's

I bought new Toshiba 40XF355 which was delivered on Friday and gained
one
hot pixel over the weekend.

I have asked the suppliers customer service to comment.
I have no idea if this is true or not, but I recall reading somewhere
that they can sometimes be fixed by gently massaging the screen.

--
Regards
Dave Saville

NB Remove nospam. for good email address

for computer LCD panels there is a piece of software that attempts to fix
some problems............http://www.jscreenfix.com/basic.php

but again all refs are aimed at LCD panels for computer applications and
not TV's. Even though they are much the same beast.

dj
I think that this whole business of dead pixels is a manufacturer cop-out.
In essence, they can't guarantee that the panel yield will always be 100%
so fob the would-be customer off with a threshold that in theory lets them
off the hook. Sorry, but that's a crock. The Sale Of Goods covers you
here - it's not of merchantable quality if it has dead pixels, period.
When I purchased my Sony 42-plasma some years ago it had a pixel stuck on
green towards the middle of the screen - you saw it all the time - you
couldn't miss it - on other colours it looked bright white (dunno why). My
dealer swapped the panel without question. If, when I buy a new panel it
has the same fault it will go back. Would you buy brand new car with a
scratch down side - "Sorry guv, it's manufacturing tolerance" - of course
not - plasmas and LCDs are no different. Providing that you buy on a
credit card (or finance agreement if you must) you have some redress even
if the supplier won't help.

In my experience, dead pixels are few and far between nowadays. I can't
recall the last time that I saw a new PC LCD screen with a dead pixel, for
example. I can accept that pixels can die after a number of years - that's
OK, but irritating, but dead pixels on new kit: no, 0/10, must try harder.


Clem

"tpow" wrote in message
...

"Dave Saville" wrote in message
news:[email protected]
On Sun, 3 Feb 2008 11:19:59 UTC, "tpow" wrote:

is there one for new LCD TV's

I bought new Toshiba 40XF355 which was delivered on Friday and gained
one
hot pixel over the weekend.

I have asked the suppliers customer service to comment.

I have no idea if this is true or not, but I recall reading somewhere
that they can sometimes be fixed by gently massaging the screen.

--
Regards
Dave Saville

NB Remove nospam. for good email address

for computer LCD panels there is a piece of software that attempts to fix
some problems............http://www.jscreenfix.com/basic.php

but again all refs are aimed at LCD panels for computer applications and
not TV's. Even though they are much the same beast.

dj
If the TV has a 15pin VGA PC input, it is a monitor and may react well to
the software mentioned. It would seem to me that the stuck pixel is more
likely to be the result of an intermittently poor electrical contact within
the LCD panel. Depending on the type of LCD panel it *may* be possible to
physically massage the affected part of the screen to resolve the problem.
Doing this doesn't require the screen or TV to be opened up, and all that
should be needed is a little pressure applied to the affected area. I
suggest protecting the screen surface from finger marks by using a soft
cloth. I've seen this work with PC monitors.

tpow wrote:
is there one for new LCD TV's

I bought new Toshiba 40XF355 which was delivered on Friday and gained one
hot pixel over the weekend.

I have asked the suppliers customer service to comment.

I notice it every time now.

dj



If it was bought mail order (?) just send it back under the terms of the
DSR.

The Sale Of Goods covers you here - it's not of merchantable quality if it
has dead pixels, period.

Well, it's alright you saying that, but would it stand up in court?
Merchantable quality isn't the same thing as perfect. I think the onus
would be on you to prove that it is not of merchantable quality and that,
frankly, is a judgement call.

The existence of that ISO standard would strengthen the vendor's argument
against you.

However, I'm pretty damn sure that if the OP takes it back and threatens a
fuss, it'll get changed like a shot.

SteveT