My brother has a MM251 used it 4 times for about 6 hours each time and now it has sat for about 4 months now bought it brand new got own bottles the whole show for this thing and now it sits.

My Question is will anything happen to the machine like the circuit board or anything internal I don't know if it is in a damp location or not but still it is a paper weight now but will it become useless down the road what exactly will happen to this machine?