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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Framiga on October 07, 2003, 03:52:54 PM

Title: Problem with a CV64 and P96
Post by: Framiga on October 07, 2003, 03:52:54 PM

Hi all,

from some months ,i've a display problem with my A4000 in a PowerTower4000, a CV64 4 MB, P96 or CGX4.2 and AOS3.9 BB2.

The problem is that the displayed pictures are too black (dark areas are not displayed)

I've tryed the AGA output and the monitor displays the pictures OK (so i don't think that is a monitor fault)

I'm not 100% sure, but the problem is began, after the towerizing the A4000 in the PowerTower.

Could be a new backplane related problem? (wrong termination on RGB signals) or is the CV64 that has some failure?

Thanks for the attention

Ciao

Title: Re: Problem with a CV64 and P96
Post by: Kronos on October 07, 2003, 04:01:21 PM

my guess:
probs with the power on the gfx-card.

try putting it in a different zorro-slot.

Title: Re: Problem with a CV64 and P96
Post by: Framiga on October 07, 2003, 04:14:21 PM

Hi Kronos

alredy done :-(

I've tryed removing all the others cards with only the CV64 card installed but . . . .

I'll try to test the voltage on the CV64 card and then to test again with the original A4000D daughtercard.

Thanks

PS- the boards installed are:

1 TBC+ ZorroII
1 RepulseGold ZII
1 XSurf2 ZII

and the only ZIII CV64 (SB11)

Title: Re: Problem with a CV64 and P96
Post by: Kronos on October 07, 2003, 04:18:45 PM

You said you tested AGA,but did you do it via the passthrough on the CV64
or was the monitor connected directly to the mainboard ?

Are all 3 colors affected in the same way or are some worse/better ?

Title: Re: Problem with a CV64 and P96
Post by: Framiga on October 07, 2003, 04:44:21 PM

Hi again,

yes AGA succesfully tested through the passtrough CV64 connector.

Colours aren't affected, the problem is still even disabling RGB (with the 3 monitor switch).

Even in greymode, if i load a greyscale pattern, the darker shades, are black.

Ciao

PS- thanks to Kronos, the ONLY ONE that had replyed to my help request.

Title: Re: Problem with a CV64 and P96
Post by: Framiga on October 11, 2003, 02:17:08 PM

-edit-

sorry, double post

Title: Re: Problem with a CV64 and P96
Post by: Ilwrath on October 11, 2003, 04:52:14 PM

Quote

PS- thanks to Kronos, the ONLY ONE that had replyed to my help request.

Hmm... Sorry-haven't been around much lately.  ;-)

I was having problems with dark shadows and image distortion with my CV64/3d - especially in higher-frequency modes.  What I noticed  is that I was getting a rather weak signal, compared to a modern graphics card.  I went with a short premium quality cable (triple shielded) and it helped picture quality quite a bit.  Hopefully your problem can be cured by something this simple!