Analogue-sequencer

I have two problems.
While i was playing my P3 went crazy. All the leds began to light up
at different times. On the screen i got Kn and other stuff and it
chances all the time. After restarting it sometimes worked but for a
little time and sometimes the leds and screen went again crazy.
Even changing menu's would put the P3 sometimes in dissordre (leds and
screen). What's wrong and what can i do?
Because i didn't backup i would like to try to save my patterns the
time the P3 works ok but i don't know how.
I use logic and sounddiver.