Matt_H:
The A3000 gurus and gives yellow screens without the daughterboard, but the A4000 works fine without it.
dvvrue95:
The simm closest to the daughterboard connector is the chipram simm and green screen indicates a chipram error, which isnt strange if you have removed the chipram simm

.
Try installing just the chipram simm.
Are all jumpers correct - was it a working A4000 that just stopped working?
Have you tried another processor card? And if so, don't forget to set the INT/EXT jumpers correct - EXT = A3640 (stock A4000 040 card), INT = A3630 (stock A4000 030 card).
/Patrik