I updated this P4015 after having strange jamming problems. Tray 3 was working fine. After I installed latest firmware it gives me checking paper path with tray 3 installed. If I remove tray 3 it works fine but as soon as I put the tray 3 back on it gives me this message, "Checking Paper Path" I also noticed it has no motor rotation. Then I replaced Tray 3 with a known working tray 3 and It works! The tray was working and now it says checking paper path... what the helk? Anyone see this? Maybe the tray pwb was bad in the first place.

Comment