If you pull out the PPC the 1200 works? No hd? No Floppy drive (if not, that is the problem: broked/missed drive prevents the Amiga to work)...
Missing drives will not prevent the computer from booting. It just takes a bit more time to show you the boot screen.
I also tried to reconnect the PPC and I also added the floppy powerconnector into mobo and RAM into PPC, but nothing changed!
What Blizzard PPC is it? With 040 or 060, with SCSI or without? The 040 cards really needs some power in order to power up, and many are known to need a reset after power up in order to get it booting. The simple way to fix this is by powering the computer with three power sources; the original PSU socket, the floppy power socket as well as directly to the PPC card itself.
I have used a BPPC 040/160/SCSI card, which is one of the most power hungry PPC cards, with a rev. 1D4 motherboard for over a year. Powered from a 250W PSU, and it's running steady as a rock.
