I also had the same problem and since I have 2 more printers i replaced evrything i could think and still the same until by luck i run out of the magenta toner and had to replaced and voila ! , no more problems
I may be able to help you. I have quite a few boards for the 740. I'll check tomorrow in my shop to see what i have. I know that I have 3 boards that that the scsi card and the flash and plus chip
4.005.44 Failure positioning drum maintanance cam during a drum maintanance cycle. check drum maintanance solenoid,clutch,home sensor and related hardware
error code 6.001.42 means X-axis home position not found.Indicates that the x-axis home sensor has failed,or something has prevented the printhead motion during a home operation
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