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I would suggest that you review the following solution.
How To Install the Optional Memory Productivity Kit to re-seat all memory modules and check all connections.
The Phaser 6600 Support & Drivers website may have additional solutions.
If that does not resolve your issue you may consider contacting our specific product support experts at the following link:
Fast Track to the Expert
I have a 6600 that I have barely used. If memory serves, it has less that 5000 pages through it and it is a year and a half old, so I don't think it's a wear and tear issue or bad rollers or dusty anything.
Now however, I can't even get the menu to work, as it boots up and says to "open the bypass tray, tray 1, and rear cover" because there is a paper jam. When it jammed, the paper did not even feed into the machine. It was not torn or ripped so there are not small "pieces" inside either. I have searched inside the thing over and over and there is NO paper jam. Right after it happened, I did all of that, and the machine rebooted and printed the startup page from tray 1. Then as soon as I used paper in the bypass tray, it "jammed" again, even though there is no paper in the machine at all. Now it NEVER boots up with the startup page and the menu is unresponsive. To say this is frustrating would be an understatement. The tray and the bypass are set to US LTR, as is the software (Adobe Illustrator), so after reading some of the other posts, I do not believe that is the issue.
I would appreciate anyones suggestions. Thank you in advance for your help.