Mine was stuck in standby but on operating any function it ran for 6 seconds then went back to standby. I removed the plastic cover from the relay and cleaned the contacts, I also checked the no load voltage per the post and it solved the problem. Not sure if mine displayed P since some of my led don’t function on the display. Hope this helps. Gordon
Update, managed to find a source for the glass encapsulated microswitch which sits in the switch and is actuated by the magnet on the end of the arm once the record is placed on the turntable, now fitted and working.