Adamasked Mar 11, 2019 at 6:36pm
4100 LaserJet tray 1 constantly trying to pickup paper
After clearing a bad paper jam, cleaned unit thoroughly. Re-assembled, now it continually tries to pick up paper in tray 1. Will print from 2, but 1 is trying to pick up. Is major issue from printing from 1 for letterhead, envelopes etc. All flags sensors SEEM to be re-assembled correctly. No doubt it was due to my re-assembly which is was very cautious about. So we can rule out drivers, NIC etc. Please help!
You have to understand that it is really hard to offer any advice without knowing the extent of disassembly or being able to see the printer. Only advice is to take it apart again and be even more careful reassembling it.
Most likely the Tray 1 paper pickup solenoid is stuck ... you will have to remove and inspect that solenoid which controls the timing of the gear which turns the pickup roller shaft.