Anonymous posted an answer for this HP 4250 Monochrome LaserJet Printer:
"1) First thing is check power source. If you have the printer plugged into a UPS..."
Anonymous posted an answer for this Sharp AL 1631 Copier:
"Moisture in the paper could also be the culprit. Toner can not transfer properly to paper..."
Anonymous posted an answer for this Sharp AL 1631 Copier:
"Remove the toner and drum. Check for wear marks on the ends of the blue/green drum..."
Anonymous posted an answer for this Sharp AL 1631 Copier:
"First run a copy from the glass and one from the document feeder. If the line is only..."