Hello, I received my Mk3 today; I have a problem: My A1200 crashes after a few minutes (or after some seconds). Sometimes it reaches the Workbench screen and I can barely use it for 30 seconds or a couple of minutes, then it turns black, or grey (the same Workbench grey of the background) and finally black. I have to power cycle the Amiga to have it start again. It gives the same problem if I skip the startup-sequence (using the "BIOS" keeping the two mouse button pressed during the computer start) and I just have the empty AmigaDOS window: some seconds and then it crashes.
The A1200 is stable without the MK3 installed.
What can I do?