Amiga 4000 + 3640 Kickrom issues

[direktorn]

Hi,
I'm trying to kick 3.1 on my Amiga 4000 but most of the times end up in issues. If i start the computer cold it mostly works, it kicks 3.1 and reboots and WB loads. But after some time things start to crash and when i try to reboot it just crashes on the way (Wb never loads) and it's stuck in a inifity loop.
 
I'm not sure if there is a issue with the 3640 and MMU or other hardware stability issues. The amiga is a stock 4000 with an AriadneII, Picasso IV and GPV SCSI card.
 
I have tried cybermap and blizkick with the same results.
 
Any ideas about what could be wrong?

[direktorn]

The instability hapends on a software level - I can get into early startup. I get a GURU error before WB loads.
 
Kicking from 3.0 till 3.1
 
It always works the first time from a cold boot. So something is happening after the kick. The kickfile comes from my other Amiga 4000 with 3.1 roms.