I have never had any blanking, or flashing, since my plasma was
delivered in January. I use mine for ON Sky DVD and a Humax linked to
Eutelstat 13 and Astra 19.
It was Chip (I think) who suggested reducing the contrast - so I can't
help on that front.
You say the problem occures on ntsc DVD's.
You say that it now occures on Wimbledon off-air broadcasts - which
must be PAL. Yes?
Has the problem never emerged on other off-air broadcasts?
I'm not sure whether you are feeding your DVD and your digital decoder
direct into the 42PWD3. Are you one of the Iscan brigade? Or are you
using some other form of AV switch gear?
If so then I'd suggest that you try feeding the DVD and decoder direct
into the plasma. You can get an RGB image from the scart of either by
getting a cable that supplies R G B and composite video. The composite
video BNC goes into the composite socket and that, with the correct
alteration to your 'set up' will derive the H and V sync you need.
This will identify whether the problem is within the plasma.
We know that Andy Guy tested an Iscan and found it hopeless. Andrew
Forkes is now on his second Iscan (the first had a red hue) and can't
get used to a 2/3 second delay in lip sync (what does he
want...perfection?). They are not creating what we call happy bunnies
Anyway, can you confirm that you are feeding direct to the plasma -
and, if not, can you try?
Then we can talk about replacements, warranties, etc.
Bye for now.
When the screen goes black, does it display "no signal" in the top right of
the screen for a few seconds?
Thomas Sturm <Thomas...@btinternet.com> wrote in message
As I have mentioned before, very occassionally I get some tearing on the
screen, followed by the picture going black and displaying "No signal". The
whole "event" lasts maybe 1 second and then the picture is restored to
This only happens on very bright / contrasty images. Interesting then,
Thomas' comments about a partial fix to his problem being to turn the
contrast down! It sounds like a similar (if not the same) problem. BTW it
wasn't me who suggested to turn the contrast down. I wonder who it was and
if they have had a similar problem? It seems like divine inspiration if
My problem *never* occurs on any s-video, composite video or component video
feed and its really no big deal. I have only detected it when viewing RGB
(via John's sync splitter), and even then only once every few days or so. I
had deduced (perhaps wrongly?) that John's box was the cause. Perhaps its
not as simple as that, since I don't believe Thomas is using John's box.
It seems to me like perhaps the Panasonic demands a really high quality sync
signal, and it struggles if it doesn't get one. This is only speculation,
but the tearing of the image is very reminiscent of monitor trying and
failing to sync properly.
Incidentally, what brightness / contrast settings have you got your plasma
on, for viewing via the PC input? I wonder if the fact that you have never
seen such an effect is because you prefer these settings lower? And maybe I
am somewhere between you and Thomas in this respect?
I do notice that the "default" image through the PC input is much brighter
and more contrasty than the other inputs and I have the settings
correspondingly lower. Its perhaps still a bit high though.
Might it have been you talking about turning the brightness down in one
of those 'how long does a plasma last' threads? Or it may have been
<<since I don't believe Thomas is using John's box.>>
But I thought he was using an Iscan....Hi Thomas, time to join the can
of worms you have opened! This is *your* thread!!!
<<Incidentally, what brightness / contrast settings have you got your
plasma on, for viewing via the PC input?>>
I'll check tonight. They are probably very high. I like my money's
I'm actually using the R G B V and H. I hit a problem getting sound
into the PC circuit (sloppy adaptor on my part and when I found out my
error I could not be bothered to swop over). However, if I get the RGB
to Component system I will probably move back to the PC socket so I can
alternate between RGB and Component.
<< I had deduced (perhaps wrongly?) that John's box was the cause. >>
I have had very slight tearing with John's Svideo converter, again with
very contrasty images - but never a problem with RGB to VGA.
Your question to Tom about whether he gets the 'No signal' message was
very astute. We await his reply with interest.
>As I have mentioned before, very occassionally I get some tearing on the
>screen, followed by the picture going black and displaying "No signal". The
>whole "event" lasts maybe 1 second and then the picture is restored to
>This only happens on very bright / contrasty images. Interesting then,
>Thomas' comments about a partial fix to his problem being to turn the
>contrast down! It sounds like a similar (if not the same) problem. BTW it
>wasn't me who suggested to turn the contrast down. I wonder who it was and
>if they have had a similar problem? It seems like divine inspiration if
>My problem *never* occurs on any s-video, composite video or component video
>feed and its really no big deal. I have only detected it when viewing RGB
>(via John's sync splitter), and even then only once every few days or so. I
>had deduced (perhaps wrongly?) that John's box was the cause. Perhaps its
>not as simple as that, since I don't believe Thomas is using John's box.
I'm sure you're right and I know exactly what is happening. The sync
separator in John's box is being fed composite video via a capacitor -
either in his box or on the output of the source into his box. What
happens is that the DC signal level going into the sync separator
moves around in response to changes in the average picture level.
Something like a sudden change from a dark scene to a white one will
cause a rapid change in the DC level and this may cause the sync
pulses to be driven too high or low for the separator to detect them
properly, hence the picture loses sync.
What is required here is a DC clamp to clamp the sync pulses to a
known level before the sync separator. I'm sure John could probably
sort out a modification to his box to avoid this happening...
The contrast setting on the screen would have no effect on this
The Doctor Who Restoration Team Website
You are on cable I think.
Might it be that your cable signal is stronger than my DTT and DSAT
signals? Thus aggravating the variation that Steve has just identified.
All part of the contrasty image causing the problem symptom?
Posted from gadolinium.btinternet.com [184.108.40.206]
As I suspected my setting are quite high.
In RGB mode they are Contrast +20 and Brightness -15.
But never a glitch.
If you are not getting the 'No signal' message it seems that the
problem is inside the plasma and not your sources.
<<now it happened on skydigital (only on the wimbledon live
broadcasts), it is clear to me,that it has nothing to do with
colorsystems. all my other gear (sky,ON, technisat for astra and d-vhs
jvc) goes through the panasonic tunerbox and so far has given me no
trouble at all>>
In the above para you say the problem does occure with Sky on Wimbledon
and then you say your Sky box goes through the Panny tuner and it gives
no problem. You contradict yourself. Is this a clue somewhere?
My settings are Contrast +20 and Brightness -15.
I have never had the problem.
My guess is that you do have a faulty screen. Whether it is heat I
Nobody will sell you an extended warranty on a screen that has already
been diagnosed as faulty. Would you?
Our attempts to get Panasonic UK to come to terms with the Svideo
mis-timing issue shows them not to be over-sensitive to customer
relationships. So I would not put too much store in help from that
Chip is better on *the law* than I am. My experience with regard to
goods that are faulty 'out of the box' is that suppliers usually
replace them. With regard to goods that prove to be faulty after some
use is that suppliers repair them.
I took out a swop in warranty with mine so that, if it does need
repairing, I get a replacement - but that is academic to you now, I
regret, and of little consolation.
Others may have a tougher view but I see very little alternative to
letting Panasonic have the screen back for repair and, if you can't do
without a plasma, getting another on rental. It is damned annoying -
but the same would apply if you'd bought a new car and found it playing
up after three months.
Sorry I offer no happier suggestion.
Since your screen doesn't display "no signal", then its not the same problem
that I get. My plasma has never just blanked out in the way you describe
and I can understand why you are worried.
Can I ask, did the set *always* exhibit this problem, or did it start to
happen sometime after you first got it? This doesn't have any relevance
legally, but it might affect how Panasonic look at the situation, from a
customer service point of view.
Unfortunatelly, you now have no rights to a replacement in UK law, since you
didn't reject the set at the time you took delivery (or close to it). So,
whether it has the fault or not, you are deemed to have legally accepted it,
and the best you are then entitled to is a repair or compensation.
However, it is possible you could get Panasonic to replace it as a goodwill
jesture, *especially* if the fault existed from the start. Like I said, you
don't have a legal right to this, but you would have a good moral argument.
My plan would be to insist that with sophisticated equipment like this, it
takes time for someone to completely check it out, and now you have been
able to do that, you can confirm that the goods are defective, and that you
would therefore like a replacement. Still, I don't know whether they would
go for it. £6,000 is a *lot* of "goodwill"!
Before any of that, I guess the first thing I would do is to insist on
getting an engineer to come and look at it. Its possible that some software
setting needs tweaking, or maybe its got its configuration settings messed
up and some kind of master-reset will fix it. Its at least worth a try, and
I would have thought it was in Panasonic's interest to check this out first.
Assuming these approaches yield no luck, then I guess the choices are to (a)
do nothing, or (b) go for the repair. And I can understand that neither is
I think (a) is very risky. I have no idea what the fault is, but what if it
gets worse? I can imagine you could easily end up with a £1000 repair bill
if it fails next year. Maybe less, but who knows? Its unlikely, but given
that it cost £6000, I guess your maximum repair bill could even be thousands
So I guess reluctantly (and if all else fails), I'd probably go for (b) and
send it back for repair. BUT I'd make it very clear to Panasonic that you
want it back in a "reasonable" timeframe, and that you will be demanding a
replacement if they are not able to fix it in a "reasonable" timeframe.
I'll leave you to think about what would constitute reasonable. I think a
few days would be unreasonably short - they couldn't be expected to repair
it in that time. On the other hand, it would be unreasonable for them to
take the set away for months. They are legally olbliged to fix it or
replace it / refund your money. "Fixing it" doesn't mean hanging on to it
for 3 months. Equally, returning it back to you a few weeks later, but not
fixed, doesn't get them off the hook either. Any court would not look
favourably on any repeated unsuccessful attempts to fix it.
Sorry I can't help any better.
"Tony Gamble" <tonyg...@compuserve.com> wrote in message
> now it has shown the problem through
> the box I can be sure, that it is not some sort of colorsystem fault.
Yes, it does seem that your screen is showing a steady deterioration.
>>the extended warranty I tried to get within days of buying the tv,
Not surprising as the warranty company would want to know they were
taking on a good plasma and not one with already established faults.
(Similar to the way a health insurance company would want you to have a
medical before offering you any cover) The only lesson, for anyone
planning to buy a plasma, is to consider the extended warranty as part
of the purchase package. I have three years for £550 and that includes
supply of a replacement.
<<they (steve lee at customerservices) seemed to be prepared to do just
The replacement. Well, you are OK then.
<< by the way how do you rent a plasmatv?>>
From an AudioVisual hire company. People rent them for exhibitions,
promotions, etc all the time. Yet another advantage of buying from
someone other than a box shifter.
Sorry, Thomas. These are not comments knocking what you have done. You
are suffering enough. They are advice for anyone else who picks up this
thread and is considering buying a plasma for the first time.
<< by the way the blackout sometimes accures when I call up the
picturemenu of the tv.>>
Well, at least you've a way of demonstrating the problem. There would
be nothing more annoying than getting an engineer to your home and then
not being to show him the problem.
Thomas, all the pointers are that you have a faulty screen. Panasonic
are the only people who can help you.
Good news about getting the set replaced. I think this demonstrates how
important it is to tell the supplier straight away, if you notice a problem.
Then, even if you carry on using the set, you can in law still be entitled
to a replacement later on.
I wonder if Panasonic would have agreed to replace it if today was the first
time they had heard of a problem? I suggest perhaps not.
Cheers and good luck!