X1800 prime turns on the off after booting up

Wondered if you can help. I’m a novice to digital music, having spent most of my life with Vinyl and pioneer mixers. I recently bought a second hand x1800 prime mixer. Had it for a few months no problems, until today. I turn on the mixer and it boots up(lights flash and go though it’s sequence) then it stays on for 20 seconds, there’s a small click sound then it turns off and the back on again. Just keeps going round and round turning itself on and off. Any ideas?

Sounds like hardware issue.

Have you tried updating the firmware?