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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: DrWhoop on March 30, 2007, 08:37:22 AM

Title: Colors flashing while using PCMCIA (A1200)
Post by: DrWhoop on March 30, 2007, 08:37:22 AM

Hi all,

I have an Amiga 1200 with a strange problem:

Whenever I use a pcmcia device the colors (especially blue) on my screen start flashing while performing disk operations. And on top of that, it only happens when I'm using the tv-out. If I use an Amiga monitor, everything is just fine.

At first I thought it was the psu, because the flashing occurs during disk IO (HDD). But a different, heavy duty PSU ruled this out.

A little while ago someone told me this was a known problem with the A1200. Could this be true? If not, any idea what this could be?

Thanks,

Michel

Title: Re: Colors flashing while using PCMCIA (A1200)
Post by: weirdami on March 30, 2007, 11:27:43 AM

Since nothing PCMCIA came out for A1200 until 25 years after Commodore went bankrupt, maybe the engineers figured nobody would notice because they had put on a technology nobody would ever use and if someone ever did, it would be past warranty time by then anyway. :-)
 :crazy:

Title: Re: Colors flashing while using PCMCIA (A1200)
Post by: pVC on March 30, 2007, 11:38:42 AM

I noticed that I have little wobbling on screen (RGB monitor), when transferring files over PCMCIA network card. It only happens to other direction.. on uploading IIRC :) It isn't too bad, but noticeable :)

I remember friend had same problem years ago.. and that it might have been common problem too, but that's all I can remember of it :) Can't remember if there's any kind of fix for it either or is it just some mobo revision's problem...

Title: Re: Colors flashing while using PCMCIA (A1200)
Post by: kd7ota on March 30, 2007, 03:08:53 PM

I had a different problem with an Amiga 600, but it would flash colors whenever the floppy drive would access, and after the amiga got hotter, it would be doing it constantly without the floppy drive going off....  Maybe its different from the PCMCIA, but it was flashing colors across the screen until it froze.

Maybe its related? :-?

Title: Re: Colors flashing while using PCMCIA (A1200)
Post by: James on March 30, 2007, 03:39:15 PM

Looks like a PSU problem to me. Both the 1200 and 600 use this dangerously underpowered PSUs.

Title: Re: Colors flashing while using PCMCIA (A1200)
Post by: Zac67 on March 30, 2007, 06:05:20 PM

Maybe the power consumption of the PCMCIA card is higher than C= anticipated and the traces are too thin? Run a reasonably sized cable directly from the PSU connector to the PCMCIA port (pins 17&51) and see if that makes any difference.