HP LaserJet 4000 / 4050 Service Training Video

[@mlw5252]

I have owned one of these work horse printers for almost 10 years. Best printer purchase ever. This video makes maintenance on these printers so much easier.

[@houndsong]

22 years and still going strong here.

[@profundumfilm5094]

Supercool! Got one setup as a networkprinter and it even prints wireless from my phone! Dont think they had any clue about that back in 1997. 😁

[@juangabriel123ify]

Very useful. I just got one of these puppies. Runs great

[@muzaffarali8750]

great sir

[@joshuadean8070]

This really helped thanks

[@RickTheGeek]

At one time I was factory certified to fix these. I guess I still am, but it’s been probably 20 years….

[@jerehamilton3139]

Mine just won't trun on any more. How to check the fuse?

[@kurtmihaljevich5149]

Mine had same problem; on the main power supply PCB there is a large 180uF electrolytic capacitor which had gone bad. I replaced it & she fired right up :) Worth checking it.

[@houndsong]

Anybody have a video on how to install the optional automatic duplexer?

[@woodss82]

It slides right into the Machine at the back watch the video

[@houndsong]

@@woodss82 Thanks! I thought I saw all of it, but didn't.

[@houndsong]

@@woodss82 Duplex print path test passed! How noisy is reasonable to expect for the duplexer? I have a "new" reconditioned 04/2022 duplexer and the fan, the motor, and the roller squeal is remarkable.