Help....weird sounds from my JMD501

[Mockingbird]

And its not just my playing this time !

Getting some really strange "heartbeat" type noises on all channels.

Intermitant.....wouldn't mind if these beats kept time !

Seriously though there're really annoying.

[Anitoli]

Try the elimination process. If using any outboard gear remove it and just go guitar, amp, speaker. Are you still getting the noise?