Prev: C4EXPO
Next: Tech: 64NAV with 64HDD PRO
From: Fergus Logan on 10 Apr 2010 13:28
Hi,

Just recently acquired a Pet 3016 that was sold as faulty. The machine
briefly displays random garbage, and the the screen blanks. Subsequent
power cycles sometimes causes the machine to display a flashing cursor
and may respond to keyboard input before freezing.

I thought maybe a good place to start would be with the roms. The
machine has basic 2.0 roms installed, and I've burnt some 2532 EPROMs
and replaced all but the screen editor rom - because this one is a 2k
type. I don't have any 2716's for this; could I use a 2532 but just
program the 2k image?

Cheers,
Fergus
From: Dombo on 10 Apr 2010 13:37
Fergus Logan schreef:
> Hi,
>
> Just recently acquired a Pet 3016 that was sold as faulty. The machine
> briefly displays random garbage, and the the screen blanks. Subsequent
> power cycles sometimes causes the machine to display a flashing cursor
> and may respond to keyboard input before freezing.
>
> I thought maybe a good place to start would be with the roms.

Considering the symptoms are not exactly the same each time the PET is
powered up I would try reseating the chips first, and if that doesn't
help take a close look at the power supply (the electrolytic capacitors
may have dried out after all those years).
From: Fergus Logan on 11 Apr 2010 04:17
Dombo <dombo(a)disposable.invalid> wrote:
> Fergus Logan schreef:
> > Hi,
> > > Just recently acquired a Pet 3016 that was sold as faulty. The
> > > machine
> > briefly displays random garbage, and the the screen blanks.
> > Subsequent
> > power cycles sometimes causes the machine to display a flashing
> > cursor
> > and may respond to keyboard input before freezing.
> > > I thought maybe a good place to start would be with the roms.
> Considering the symptoms are not exactly the same each time the PET is
> powered up I would try reseating the chips first, and if that doesn't
> help take a close look at the power supply (the electrolytic
> capacitors may have dried out after all those years).
>
I have re- seated all socketed chips, and swapped some for known working
ones.
I will have a look at the caps, thanks.
 | 
Pages: 1
Prev: C4EXPO
Next: Tech: 64NAV with 64HDD PRO