Posted Thu Jan 12, 2023 5:53 am
Unfortunately not.
All chips in the A600 are soldered directly to the mainboard except the KickROM.
The only thing you can from afar is order a DiagROM, e.g. from eBay, and replace the KickROM. Then you can execute at least some tests.
And you can send over a fresh Workbench 1.3 or 2.1 disk as a minimal test. If that works it could be a software thing. Maybe a broken disk.