Color corruption - what is this?
 

Hi

I was so happy to finally get my new HDTV setup going - spent a good 3
hours watching in amazement.

It was fine for a while - now im getting some really weird 'color
corruption' (I dont know what to call it). See it at

http://img386.imageshack.us/img386/4694/sa400152xl2.jpg

Does anyone know what that is called? I have turned the color setting
right down to illustrate is best. Even with that, there are still
splashes of red and touches of green on the screen. It happens every
time I turn on the set but goes away sometimes (maybe after
20mins-2hrs).

It happens on every channel (not just Sky or DVD's) and even on the
internal digital tuner.

Anybody any ideas what could be causing this? Is a fix possible or just
send the tv back? It is a 32" Vistron (LG panel I think).

I have already tried disconnecting everything, leaving it unplugged for
a while and then watching internal tuner but problem still there.


Thanks for any help - i just want my HD back!

Color corruption - what is this?
 

Simple answer: your TV is defective. Since it is apparently a new
purchase, this is an "infant mortality" situation: take it back to the
merchant who sold it and request a replacement (not repair).

More detailed answer: this problem happens with all sorts of LCD devices.
I've never had it happen with a TV, but I once had a PDA that did that and
it only showed up when displaying photos. Some signal is stuck high (or
low) to the pixels.

It's not all that common; most consumers will never see it even after
buying multiple gizmos. But any sizable merchant will have seen it
before. It usually shows up shortly after purchase. Most merchants will
just replace it rather than have you deal with the manufacturer's
warranty.

There is no repair; the device is a lemon. Even if the merchant won't
replace it for you, the manufacturer will as long as it's in warranty.
Fortunately, as noted above, it rarely happens to out-of-warranty devices,
and generally shows up shortly after purchase.

-- Mark --

http://staff.washington.edu/mrc
Science does not emerge from voting, party politics, or public debate.
Si vis pacem, para bellum.

Color corruption - what is this?
 

Thanks for the info and the quick reply. I can RMA it if I contact
retailer in the next few days.

Weird thing is it worked fine for the first 2 weeks. Corruption seems
intermittent but getting worse.

AND - I swapped in my old CRT SDTV that had worked perfectly for 6
years before and after 10 mins the thing cut out. Had to unplug it and
plug in again to any picture. It did that several times.

That makes me think there maybe is some problem at my end. Maybe power?
A short somewhere or damage to satellite cable? Also thinking the new
speakers may cause a problem with the really powerful z5500 sub only
~40cm away from tv? but i thought wouldnt effect lcd tvs?

Thanks again for any ideas

more pics if anyone is interested
http://img365.imageshack.us/img365/3741/workingli1.jpg
http://img341.imageshack.us/img341/7...orset02gr4.jpg
http://img330.imageshack.us/img330/6...rnormalhi2.jpg
http://img341.imageshack.us/img341/3839/pcinputwf7.jpg
http://img336.imageshack.us/img336/3855/rikkisq5.jpg


Mark Crispin wrote:
Simple answer: your TV is defective. Since it is apparently a new
purchase, this is an "infant mortality" situation: take it back to the
merchant who sold it and request a replacement (not repair).

More detailed answer: this problem happens with all sorts of LCD devices.
I've never had it happen with a TV, but I once had a PDA that did that and
it only showed up when displaying photos. Some signal is stuck high (or
low) to the pixels.

It's not all that common; most consumers will never see it even after
buying multiple gizmos. But any sizable merchant will have seen it
before. It usually shows up shortly after purchase. Most merchants will
just replace it rather than have you deal with the manufacturer's
warranty.

There is no repair; the device is a lemon. Even if the merchant won't
replace it for you, the manufacturer will as long as it's in warranty.
Fortunately, as noted above, it rarely happens to out-of-warranty devices,
and generally shows up shortly after purchase.

-- Mark --

http://staff.washington.edu/mrc
Science does not emerge from voting, party politics, or public debate.
Si vis pacem, para bellum.

Color corruption - what is this?
 

On 31 Aug 2006 18:08:22 -0700 androo87 wrote:

| Thanks for the info and the quick reply. I can RMA it if I contact
| retailer in the next few days.
|
| Weird thing is it worked fine for the first 2 weeks. Corruption seems
| intermittent but getting worse.

It might be some defective part that is finally pushed into failure
by a few hours of heat. Or it could be something loose caused by
the incessant small vibrations of a living environment. Or maybe
the power supply is prematurely aging (usual cheap capacitors) and
is under or over voltage.


| AND - I swapped in my old CRT SDTV that had worked perfectly for 6
| years before and after 10 mins the thing cut out. Had to unplug it and
| plug in again to any picture. It did that several times.

Loose connections somewhere, probably inside. It's also a common
failure mode on computers, except that what "cuts out" is often
some critical data or address bus line, and the CPU croaks.


| That makes me think there maybe is some problem at my end. Maybe power?

Or power supply.

I had a computer that ran non-stop for 7 years. Then in February, we
had a 30 hour power outage that the UPS couldn't cover so it went cold
for the first time in years. Power back on and in a few seconds it
went *POP* and the strong stench of magic smoke. Autopsy disclosed a
melted transformer coil and a few other places of obvious heat damage.
Most likely accumulated heat damage, and the high restart current put
it over the edge. Swapping power supplies around got the computer
that I needed back up.

--
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| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
| first name lower case at ipal.net / |
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