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Hello,

My HP Laserjet 4M+ is throwing an Error 51 when attempting to print. I have replaced the laser scanning assembly (Original part RG5-0911) with RG5-0449. I'm reading conflicting information...

Ok after spending some time with it, it seems to appear to be power related... not mechanical. I made a video that shows the LED status and picks up the "clicking" sound... seems like a relay or...

Thanks for the reply Al. I plan to dig into it over the weekend and see if I can find anything obvious but I'm not holding out much hope. I figured the lights blinking would be a sign of something...

Hello all,

My trusty LJ 4M worked fine until power up one morning and while during the power up self test sequence, the Ready, Online, and Form Feed LED's started blinking and it started making a...