10mm blue line each side of picture on samsung plasma

9tjc · 10 Jun 2010

hi all
i have a samsung 50"plasma which is approx 2years old but in the last week has started showing approx 10mm blue lines each side of my picture.any help would be appreciated as the tv is under the 5 year gaurantee from john lewis.

ChrisFrost · 11 Jun 2010

Your source wouldn't happen to be Sky, would it?

9tjc · 11 Jun 2010

ChrisFrost said:
Your source wouldn't happen to be Sky, would it?

yep it certainly is, can you help?

ChrisFrost · 12 Jun 2010

Your TV is showing the aea outside of the picture that Sky is broadcasting. I get this a lot with projectors. Some channels are probably worse than others. Try CNBC and Scuzz to see the worst offenders.

The fix is usually to do with the TVs Aspect Ratio button. You might also have to check your TV menus for any scaling options. If they are set to the Samsung equivalent of Exact or Direct then the TV will be showing the picture as broadcast rather than expanding it a little to hide these off-the-picture areas.

Try the above and lets us know how you get on.

9tjc · 13 Jun 2010

ChrisFrost said:
Your TV is showing the aea outside of the picture that Sky is broadcasting. I get this a lot with projectors. Some channels are probably worse than others. Try CNBC and Scuzz to see the worst offenders.

The fix is usually to do with the TVs Aspect Ratio button. You might also have to check your TV menus for any scaling options. If they are set to the Samsung equivalent of Exact or Direct then the TV will be showing the picture as broadcast rather than expanding it a little to hide these off-the-picture areas.

Try the above and lets us know how you get on.

tried changing it from "just scan" to "16:9" seems ok but i am not sure if it will cause other issues as i am sure "16:9" was causing me issues top and bottom and that was made me use "just scan" in the first place.thanks for help and i will keep you posted on any further issue.
thanks again 9tjc

ChrisFrost · 13 Jun 2010

Make sure your Sky box is set to 16:9

Mickymoody · 15 Jun 2010

The Sky box should auto correct on auto scan, maybe you need a better SCART lead, or whatever lead you are using, as different leads are wired up differently.

ChrisFrost · 15 Jun 2010

If by Auto Scan and refering to SCART wiring you are thinking about 4:3/16:9 switching then that's not the problem here.

What's happening here is that thre's insufficient overscan to mask the framing errors of Sky's various channels. New SCART leads aren't going to fix that.

Mickymoody · 16 Jun 2010

ChrisFrost said:
If by Auto Scan and refering to SCART wiring you are thinking about 4:3/16:9 switching then that's not the problem here.

What's happening here is that thre's insufficient overscan to mask the framing errors of Sky's various channels. New SCART leads aren't going to fix that.

My thinking is that a non-fully wired scart lead is being used. I had a cable box, with a good quality, large screen CRT TV, and you could see the pixelation, in the end, I got rid of that and got Sky TV, and the quality still wasn't there, so forked out £70 for a good quality scart lead, and all these issues disappeared. I know people that have cheap flatscreen HD TV's, but I firmly believe that my non HD CRT has a better quality image, as it is a high end CRT TV, than a HD picture, on a cheap LCD.

A properly wired, quality scart lead, makes all the difference.

ChrisFrost · 16 Jun 2010

For SCART cables, non-wired and interference are two different issues.

Non-wired (i.e. a directional SCART cable, or one with only certain connector pins wired) would limit the types of signals and functionality available. It wouldn't create interference.

Interference could happen with a partially wired or fully wired cable. It's usually from insufficient shielding.

Neither of these two issues would cause the TV to underscan.

I know what you mean about CRT images compared to flatscreen TVs. CRTs are far more forgiving of the pixelation and noise present in the average digital transmission; and it helps that the image isn't being scaled to a higher screen resolution or being magnified so much because flatscreens are, in general, much larger TVs. Bad scaling and too much image processing plagues consumer TVs. There's a world of difference watching an image on a properly sorted display compared to almost every consumer TV I see. Standard Def is still limited in the detail it can carry, but raping the image with all manner of digital picture "enhancements" isn't the answer. The problem is that most of us haven't lived with a properly displayed image so have no point of comparison.

echoes · 16 Jun 2010

Does your TV have an 'overscan' setting buried somewhere in the menu? If it does, try turning it on.

plugwash · 16 Jun 2010

ChrisFrost said:
Non-wired (i.e. a directional SCART cable, or one with only certain connector pins wired) would limit the types of signals and functionality available. It wouldn't create interference.

Afaict the most common type of partially wired scart cable is the "compsite video and audio" type. As the name suggests this does not support RGB.

Composite will nearly always be lower quality than RGB and some gear has really ****ty composite outputs. A ****ty composite encoder can look very much like interference.

ChrisFrost · 17 Jun 2010

plugwash said:
Afaict the most common type of partially wired scart cable is the "compsite video and audio" type. As the name suggests this does not support RGB.

Which is another way of saying exactly what I wrote already...

ChrisFrost said:
Non-wired (i.e. a directional SCART cable, or one with only certain connector pins wired) would b]limit the types of signals[/b]and functionality available.

So what exactly is your point?

plugwash said:
Composite will nearly always be lower quality than RGB

I would have thought it's not "nearly always", it's simply "always".

Given a colour separated source signal to start with, converting to composite is going to lose detail and introduct cross colour distortion. The only way that RGB could look as poor as composite is in decoding to RGB from a composite source signal.

plugwash said:
A s composite encoder can look very much like interference.

I suppose cross colour distortion and moire could look like interference to the untrained eye, but it still wouldn't produce the underscan problenm that the OP is experiencing.

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10mm blue line each side of picture on samsung plasma

9tjc

ChrisFrost

9tjc

ChrisFrost

9tjc

ChrisFrost

Mickymoody

ChrisFrost

Mickymoody

ChrisFrost

echoes

plugwash

ChrisFrost

DIYnot Local

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