Please help our Milltronics vm25xp will boot up and stop at black screen saying no keyboard detected if we boot it up with external keyboard connected in USB port is boots up normally but we still can't get it out of estop. No buttons will work on control panel and some lights stay on. I only get the normal error code 1450 as of its in estop with the external keyboard plugged in. if I can get it out of estop I'll be fine is there any way to do so with keyboard instead of control panel. any info would be appreciated ty.