My A2000 is not very stable.
Sometimes it refuses to boot and sometimes even a slight movement will make it crash.
I have checked to see that the socketed chips are pressed in properly which they are.
I tried replacing the OCS AGNUS with one from an A500+ (1Mb ECS) and the A2000 would not even boot. Not even the grey screen.
The A2000 has 512k chip ram and 2mb fast ram and is currently being powered using a PC AT power supply.