I replaced the battery on the motherboard yesterday so hopefully that will have fixed it. I should know tomorrow as it ain't run all weekend so it will def be out of charge.
Only thing is the computer wasn't losing time so worried it might actually be the cnc actual computer.
My first port of call is to phone Scm usually but my boss ain't payed his bill so they won't talk to me until it's been sorted hence why I've turned to here for some knowledge :)

Cheers