Common Error Codes and Problems with the HP LaserJet 4000, 4050, 4100

In this article I’ll discuss the variety of common service related issues in the early HP 4000 series printer family. You may be wondering why I’m focusing on these older printer models.  In my opinion, next to the HP 4 and 5 series, the HP 4000 series is one of the best lines of printers ever made. Many of these machines are still in the field and, due to age, some of these problems are becoming more frequent. Because these machines have become “more repairable” over the last year since the price on the parts has drastically dropped and the cost of the toner cartridges have gotten lower, they are some of the cheapest machines to run given the cost per page. So for your customers who are thinking about how they can get the most for their money, these machines offer what they are looking for.

NOTE:  Almost all the part numbers listed in this article are for the 4000 series. The 4100 uses different part numbers for the feed rollers, pick up and feed assemblies, and the paper size board is different on some of the models given the extra feed trays. Get the 4100 printer specific part numbers here

Let’s take a look, then, at some of the common errors.  Continue Reading

HP LaserJet 2400 Series; Noise in Rear of Fuser

The 2400 series of HP printers are prone to excessive noise in the rear of the machine. Unlike the P3005 engines where, typically, the noise is more gradual and seems to take longer to generate service calls, the 2400 series tends to really develop it’s noise problems at 40,000 to 45,000 copies and it can get extremely bad around 70,000 to 80,000.

In the HP 2400 series printers, while the noise problem appears gradually, it seems to greatly worsen in a short amount of time. I see a lot of service calls generated for this specific problem, unlike with the HP P3005 model where it’s kind of a secondary issue…“Oh yeah, and it seems to be running louder now then when we first purchased it.” I find than many users are afraid to continue to use the 2400 series because it sounds like parts are being destroyed. So identifying the problem in this model is easier and the fix is much more satisfying, because the printer is drastically quieter after it’s been repaired.

What to do on a service call
First, run a few prints, including the configuration page, to check the machine’s usage, overall condition, and its noise level. Then remove the fuser and check out what‘s happening in the rear of the machine, following these directions: Continue Reading