BMC 20 Max 3 version 1.

I try to keep the machine switched on these days but unfortunately we get the occasional power cut in the night. When I switch it on the buttons on the manual jog hand unit thingy don't work so I can't move the machine manually. It will calibrate ok and would run a program provided it was setup in conversational mode prior to the power cut. I cant get it to work eventually by switching off then on again a few times until it comes on. Sometimes I have to do this as many as 10 times. Something's on it's way out I guess and one day it will probably fail completely. Any ideas or advice?