Emco CNC 5 help needed


I have a CNC 5 that's been running great for years.
But now I have a problem I have not been able to solve.
The computer freezes & both axis motors stop moving during automatic cycle.
The display stops moving on the current command line.
No alarm or message.
Spindle continues to run & display speed.
It's just like a "Feed Hold" was pressed.
Machine has a tool changer, spindle relay & a video display. 

At first the problem only happened occasionally.
Now It happens almost every cycle.
I know very little about electronics.
Any and all help would be appreciated.

Thank you,


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