[comp.sys.amiga] which chip has been fried?

hoehle@hpki.world ("Joerg-Cyril Hoehle TAG-Gruppe") (11/13/90)

test

hoehle@hpki.cs.uni-sb.de ("Joerg-Cyril Hoehle TAG-Gruppe") (11/13/90)

 Seems I don't get the correct `From:' address, please use the adress
 below, or remove the "hpki", eg. hoehle@cs.uni-sb.de
 (hoehle@hpki.cs.uni-sb.de may work, but is not `supported')

While installing my new SUPRA 2MB memory board in my B2000, some chip
must have been fried, as this is what I experienced:

On random intervalls, the screen shows only the background colo(u)r, and
keyboard and mouse do not seem to work anymore. However, multitasking
is still alive, as it once occured while MED was playing (and it
continued), and the drives are still clicking (most times).

The history:
- I tested my Amiga before installing the board to make sure that
everything works fine. Ok
- I installed the Supra board in TEST mode, ran the SupraRAMTest
program, while playing with multitasking. Ok
- I switched the jumper from TEST to RUN mode (the Amiga turned and
plugged off). I booted, started a few programms, and a few minutes
later, the screen suddenly got the background colo(u)r. I rebooted,
same scenario. It took more or less time to lock up. 
- After lots of trials, that is the current state:
I removed the SUPRA board. It locks up very early, usually I
don't even get the initial workbench screen. But it doesn't seem to
always freeze at the same place.

Hints:

The machine is a B2000 Rev4.3, Kick1.3, 512K Chip, 512K Slowmem, A2088
(bridgboard), Kronos controller with 80MB Quantum, running AmigaDOS/ARP
1.3 and ConMan.

I'pretty sure this is not a virus (especially not the SCA which
blanked the screen), because a virus infection does not fit the above
scenario, unless it's a very new and tricky one. (And where should
the virus come from?)

When I boot from HD now, the amiga SELDOM works until it opens the
initial screen. It happens sometimes, though. It says "(C) Amiga, ...
[CLI 2] (which must be run execute startupII or arun setclock load
from my startup-sequence)", then it locks up.

When I click the left mouse button during boot, the HD is made unknown
to DOS, and I MOST OFTEN get the WorkBench hand. When I insert a
floppy, the screen blanks and the light of the drive stays on.
Sometimes I don't even get the Workbench hand.

MOST TIMES, the amiga does not seem entirely dead, because I can hear
the clicking of the drives.

Any help appreciated...

	Joerg.
hoehle@cs.uni-sb.de

Please email any responses, because of traffic and my not reading
c.s.a* every day.