you have gecko drives !! each one has its own cooling fan, generally when the entire machine stops it is a cable problem, also the daughter board for wincnc can act up clean inside the computer and do not blow dust directly into the components, i will show this to some guys who are familiar with the machine
also the 37 pin cable coming out of the grey controller box looks to have stress on it, relieve it a bit and check to make sure it has a good connection
jim
James McGrew CAMaster 508 ATC
www.mcgrewwoodwork.com http://dropc.am/p/EJaKyl