but . . .are you sure?!?
Have you contacted Ron?
Intermittent problems with CSPPC, often are located at:
Local bus connector (reseat the card and check if the spacers are the right one)
and 060 socket.
Before send the card to Amiga.fr, ask to a technician to leave out the 060 CPU from the socket and reinsert it again.
Consider that Hyperion "check-test" only the board and then will send it to Amiga.fr.