I have the same issue. Reviving thread to see if this user got it resolved? My understanding bopping around the internet is that it's typically chip u103, 104, 105, or 106 failure?
My story: Amiga 2500. Sat unused for 2 decades. Booted it two years ago and was able to launch my Video Toaster. Said, "cool," then put it back in the closet for 30 months. Well, finally decided to mess around with it again.
Pulled it, cleaned it, put it back together.
The quantum drive began to fail. My Chip RAM wasn't showing 1MB like it's supposed to. Toaster won't launch.
Well, hell.
Guess I broke something. Now what? I ordered a AmigaKit floppy disk from eBay, but that's not getting here 'til mid July.
Advice appreciated. Thank you!