I have a riso mz 790u and it has just run out of masters. Upon attempting to replace them I booted up the machine and pressed the green master release button. Immediately the machine began to shake violently with the shaking originating at the Master Making Unit. The shaking does't appear to be stopping and the door seems jammed. I have powered on and off numerous times and the shaking just keeps happening...Any advice?
No error code just a bar on the lcd that fills up 90% and says "please wait."
I think someone closed the master unit door...it seems to not be lining up flush...none the less still will not open, just shakes in attempt to open.
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