G3 iMac screen geometry

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Ian - 26 Jul 2005 08:22 GMT

I have a G3 iMac running Panther and have noticed that the
Dock falls off the bottom of the screen by a few millimeters.
I go into the Display settings and adjust the Geometry of the
screen (height, vertical position) to display the whole Dock,
but the next day I boot up the iMac, the screen has "fallen"
a few millimeters down again so I can't see the little triangle
under the running apps.

Are these settings stored in the PRAM?
Would a new PRAM battery solve the problem?
My system clock has never lost it's time/date so I can't see
the battery being the culprit, but you never know.

Or is this a common fault with G3 iMac's?

Cheers
Ian

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Deltic - 26 Jul 2005 14:30 GMT

> I have a G3 iMac running Panther and have noticed that the
> Dock falls off the bottom of the screen by a few millimeters.
[quoted text clipped - 13 lines]
> Cheers
> Ian

Hi Ian

I'm not sure if this is what you mean but, my G3 iMac does the same
thing whenever it is started from cold (say from being switched off
overnight). However, after a few minutes when the CRT warms up and
stabilises, the bottom of the image moves up slightly and it corrects
itself. This behaviour has occurred from new in 2000.

Your theory about the PRAM battery may be correct, however that usually
results in the screen returning to the factory default position when the
computer is shutdown. It might be worth clicking on the "Factory
Defaults" button in the Displays system preference and see if this has
the same effect on the screen geometry as when the computer is switched
off. If it does have the same effect, I'd say the PRAM battery is flat.

Regards John

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Ian - 27 Jul 2005 21:09 GMT

> > I have a G3 iMac running Panther and have noticed that the
> > Dock falls off the bottom of the screen by a few millimeters.
[quoted text clipped - 30 lines]
>
> Regards John

Hi John
I think you're right about the CRT warming up.
This morning when I booted up the iMac the screen had "fallen" a few millimetres
down, but I resisted the temptation to adjust it and just let it warm up, and yes,
it does move up and correct itself after several minutes.

Thanks for you input.

Cheers
Ian

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Rifty - 27 Jul 2005 06:35 GMT

> Or is this a common fault with G3 iMac's?

Just to give you some point of comparison, I have run a lot of G3 iMacs
over 5 years or so, and have never encountered this problem.

Maybe I've just been lucky, but my experience suggests it's not a common
problem.

Rifty

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Academic and Computing Help
http://rifty.net

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Ribfeast - 28 Jul 2005 07:14 GMT

Don't adjust your screen so that it goes right to the edge. You should
leave at least 1cm of 'black' around all sides. The geometry will change as
the screen warms up to operating temperature.

On 26/7/05 5:22 PM, in article 42e5e53f@dnews.tpgi.com.au, "Ian"
<ian@no-spam-please.com.au> wrote:

> I have a G3 iMac running Panther and have noticed that the
> Dock falls off the bottom of the screen by a few millimeters.
[quoted text clipped - 13 lines]
> Cheers
> Ian

Reply to this Message

Ian - 28 Jul 2005 21:16 GMT

Hi Ribfeast
As these iMac's only have a 15 inch monitor (and only 13.8 inches of that is viewable),
it's very tempting to stretch the screen to the edges just to get a reasonable sized screen.
As Deltic pointed out the other day, the geometry does adjust when the CRT warms up
so it's all good now.

Cheers
Ian

> Don't adjust your screen so that it goes right to the edge. You should
> leave at least 1cm of 'black' around all sides. The geometry will change as
[quoted text clipped - 20 lines]
> > Cheers
> > Ian

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Mac Forum / Country Specific / Australian Mac Group / July 2005

G3 iMac screen geometry