Prophet 5 ERROR 8

[Fredbo65]

Hello to everybody.
This night happen some strange.
I turn on p5 REV 4  and after 30 minutes switch off alone. after a few minutes i tried to  switch on again and appear " 8 " on display...
all button locked , and completely dead !! exist some combination for reset this?
Thanks
Fred

[Analog Prophet]

Scary! Hopefully you’ll find the solution here:
https://support.sequential.com/hc/en-gb/articles/5314996425362-Prophet-5-10-Keyboard-Troubleshooting

[Fredbo65]

Thanks a lot, but at the moment trying to switching on the keyboard seems dead

[Analog Prophet]

Does it respond to MIDI from external keys/sequencer?