Power switch

hi guys just a quick one, had my mcx-8000 close to 2 1/2 years, it’s been back to denon twice in 2018, once for a failed power switch and freezing displays, then a second time for freezing displays, anyhow the last year it has worked faultlessly, until last saturday it would seem the power switch has failed again and the unit is stuck on. now i know i’m probably out of luck for a warranty repair, so if i leave the unit as is, will it stay powered on indefinitely? my only worry is it will fail half way through a gig.