@ james :I'm not sure the hardcopy is set to the floppy drive
I don't think the CPU is crashed because the scope reacts normal when pushing autoset button (relays clicking)
i checked the output voltage of power supply: 14,82V =ok
I measured the elco's on the battery board with RLC meter => ok
I checked the voltages on the tantalum smd caps near the 4 voltage regulators on the main board
c990: 4,91V
c940: 4,962V
c933: 4,976V
c905: 3,295V
c967: 3,296V
2 other tantalum
c725: 5,10V
c969: 5,10V
voltages near regulators seems ok to me: 5V and 3,3V for the digital parts
I'm not sure about the 5,10V . Someone can confirm?