Geeetech

Hi All, I have recently rebuilt my Acrylic frame Geeetech I3 pro B 3D printer into the Aluminium version.
My GT2560 no longer works properly.
I can use the LCD screen to autohome the extruder, move easily in x, y and Z direction etc.
But.. it will not print.
The print will start, then the LCD shows strange figures, then it stops printing.
Also, I cant upload any firmware to the GT2560 via USB like I could before.

Is there some diagnostic software that I can run ?
Regards,
Mike.

Which board do you use?The GT2560 or sanguinologu? Could you show me the strange figures?
I think you can use the Repetier Host and check the logs of the communication between the PC and the printer.