Redwolf1,
040's run very hot, and are Power Hungry !
were you running your setup on an original A1200 PSU ?
you may well have overloaded the PSU, and quite probably overheated the CPU taking other sensitive bits of A1200 with it.
questions -
a) does the 1200 still run without extras (ie a bare bones floppy boot - no add ons added in !) ?
b) did you use a Heatsink on the 040 ? (even if it wasnt an 040, 030s get pretty warm too)
If you want to run AOS4 you will need either a classic Amiga with a PPC board (CyberstormPPC for A3/4000, BlizzardPPC for A1200 - kinda rule the last one out given the above !) or an Eyetech AmigaOne. you will also need to exercise some patience and use Linux with UAE (Amiga Emulator) on it, as AOS4 aint out yet.
note:
I havent had any problems with my A1200's aside from a flakey apollo (you guessed !) 1230/40MHz accellerator (overclocked from 33MHz) and having burned out one of the Custom Chips (Gayle I think) by using a 3.5" HDD and a CDROM without the protection of a Buffered IDE board. I learned my lesson the hard way - £50 for the repair !
