TV Blurr?!?

[ukmgranger]

My 28" Sony Trinitron seems to be blurred at the edges and the corners of the screen.

It has always been like this with the computer connected to it - but is it normal?

On all other inputs it is fine (such as DVD, Digital inputs).

It is really frustrating when I am trying to do stuff in win XP as I have to drag anything that I want to read into the centre of the screen.

[mlbdude]

Could be a video card problem. What video card are you using, what connection type are you using, and what resolution are you running at?

[ukmgranger]

The video card is called a 'Verto' by PNY. On my hardware config it comes up as an 'NVIDEA GeForce4 Ti4800'.

This connects to my TVvia a S-Vid to Scart cable.

The desktop resolution is 800x600

[kny3twalker]

thats normal
you just have position and size the screen to the best of your ability
if that Sony is HDTV compatible use either component, DVI, or VGA rather than svideo
my Sony the edges of the screen are warped a little
more on the left side than on the right

[stanger89]

FWIW both my 36" RCA HD ready and my parents 46" Mitsubishi (also HD ready) both get fuzzy toward the edges, it's a limitation of the technology, it's really hard to maintain beam focus/convergence at the corners of the display.

And it's probably the same on all the inputs, it's just the fact that normal TV/Video doesn't have the fine detail/lines necessary to exhibit the blurryness like Windows and/or Sage text.

[mls]

Originally posted by kny3twalker

my Sony the edges of the screen are warped a little
more on the left side than on the right

kny - I'm sure you already know this, so I'm just tossing this in for anyone else passing thru...

A "standard" NTSC image is roughly 352 x 240, however what a normal 4:3 TV displays on the screen is closer to 320 x 240.

The reason the original signal was made wider than what a tv would display is because way back in those early days TV's had a lot of problems with horizontal sync and centering. Was just easier to have "more than needed" to avoid ending up with a black bar on one side or the other if the TV circuits were not exactly correct.

Another prob that occurs with some tv's is what in the TV repair world is often referred to as "jello" or "ballooning".

The horizontal circuits supply a transformer that is used for the high voltage of the picture tube. If the high voltage circuits and regulator are not designed good enough, when a picture becomes overly bright it draws more current (dropping the voltage) which allows the electron beam to scan wider. Darker images would scan narrower.

This effect is often more noticable on the width simply because the horizontal circuits may be effected.

That's what "over scan" is for, to solve those varying edge/width problems.

However, with what ukmgranger said about his situation... That sounds like a problem with the video card, since he says it is clear only in the center and blurred all the way around otherwise. But, then again he's messing with SCART conversion also, so there could be other problems.

[mls]

Also, since he is England, that means he's in PAL land. That makes things even more complicated if he's mixing and matching PAL with NTSC.

He'd also have to check the settings for the video card to make sure they are correct for whatever output he is trying to use.

I have no idea what settings would be correct there depending on what the source recording is, what the video card is capable of, what the SCART is doing to things in between, and what the TV is designed to work with.

[kny3twalker]

not going to quote all that text, mls

but was not sure if that was the issue

glad you know more about this and can explain it well

Robert