I have a Colorqube 9301 with approximately 200,000 prints and it is giving me lot of trouble getting it to print. The error 091-612 appears, I've purged the head, reset the software and still the smae error. At times it gets stuck in a software reeboot. I've found the following fault happening regularly 391-612-00 Head 3 wave amp calibration error, this fault happens when the unit power cycles. Any suggestions or instructions to update firmware/software/PEST? I'm in an error with little access to support so I try to fix the issues myself.