Swing Plate Assembly
HP LaserJet 4200, 4240, 4240, 4300, 4350, 4345MFP Loud Grinding Noise
A very common issue with the HP LaserJet 4200, 4240, 4250, 4300, 4350 & 4345MFP is a loud grinding noise. The issue is attributed to HP LaserJet printers fusing assembly and the LaserJet swing plate Assembly not properly engaging each other due to worn gears. When the LaserJet printer gears become worn they will not properly align and you will start to hear a loud grinding noise from the rear of the printer. Delays with repairing of printer will result in continuous paper jams and an eventual complete failure of the LaserJet printer.
Replacing the swing plate assembly and fusing assembly will resolve the grinding noise.