I recently got a C30F-A002 attached to a FS06N welding robot from a trade school. It appears to be in beautiful shape and only has a few thousand hours on it, but when I power it up it only boots to a blank screen. The backlight comes on, and it appears that the lcd is showing straight black. I originally thought it might be the MFP so I found another one and got it and it reacts the same way. I got some new batteries made for the cabinet and the robot, in case that might be the problem but it still is doing the same thing. After booting if you touch the right top or right bottom corner of the screen it does beep, but that is all of the response that I can get out of it. I have messed around with the contrast knob and that doesn't seem to be the problem.
Where would you go from here?
Might it be a display board inside the controller or something?
Can it lose its software after being off for a long time and be dead unless it is reloaded?
Thanks for any help or insight that anyone might have!
Info about this specific machine:
AS Software: 33010KFE
Servo Software: A1B0F-F025
MFP Software: T3010K4E
It is attached to an FS06N welding robot
It has a 50817-1182R04 Teach pendant (batwing style)