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Unfortunately there are several offices on the same breaker, and the LJ4100 draws more current that the P2055d does. So this is what I did:
I went out and bought a 12' USB cable, then took it...

You might try a newer JetDirect card. J7934A or better. We have been replacing all of our older Jetdirect Card (with slightly newer ones) but this has resolved a lot of the 49 and 79 errors. ...

I have a user that had a LJ4100 printer (parallel) for eight years directly under a fluorescent light. He never had any problems with it. But when we replaced the 4100 with a new P2055d, the bulb...

The printer is up and running now, and this is one fix you will most likely shake your head at...
I looked out on the internet under LJ P2015 and found several hundred people that have had the same...

One more piece of information to add. I have since found out that this happened to both printers when they changed out the toner cartridges. I've looked inside but I don't see any obvious damage.
...

Ok, I tried a cold reset and reseting NVRAM. Holding down the Go button didn't have any effect on the five lights. I could never get any type of change with the lights. I also tried removing the...

I'm not sure that this printer is worth the effort to fix, but I promised I would make an attempt. So...
does anyone know what three amber and two green lights mean when the printer is first...

I had the same problem on a 8150DTN last week. As Steve said, it was the toner (turns out that they had installed a refurb from an office supply place). I replaced it with an HP toner and all was...

At the risk of sounding mean, I don't think this executive secretary ever figured out that the big number '1' on the front of the printer meant anything. She has always used tray two and just...

I've got a LJ3000dn that randomly throws 13.01.00 errors. The problem is that they don't use tray 1, ever! It only happens at the start of a print job, before the printer even tries to pickup any...

Is the paper getting into the transfer guide?

I don't know why I didn't try this before: (After the DC Controller switch) I disabled the Cartridge check and switched the blue and red toners and now I'm getting blue lines and blue ghosting, and...

54.05 that's all, no third set of numbers. And yes, these two errors are the only ones that show up in the event log after I changed the controler board.

Well the DC controller didn't fix it either but it did change the event log. Instead of all the different halftone calibration errors that I was getting, it's down to one halftone error and a media...

The engine test failed miserably. Once a thick red line appears, the normal red lines are uniform for nine repetitions down the page (about two thirds of each page. After that, the normal red lines...

Looks like nothing made any difference;
I've tried a cold reset, NVRAM reset, firm ware upgrade, and four full calibrations (once after each of the cold reset, NVRAM reset, and firm ware upgrades). ...

I've got a two year old LJ3800dtn that is printing horizontal red lines at various places across all printouts. Also there is image ghosting and image misplacement of the red portion of the image...

Thanks for the info Jeff. I'm currently collecting data on the problem. And you're right about HP being uncooperative. They flatly stated that the problem was either something in our network...

Unfortunately our company believes that the world will come to an end
if we test/use anything with non-approved/non-standard applications.

David

The bottom slot (J1) is ROM only. I actually removed the 16 meg DIMM for J2(third slot from the top) and swapped it with the 16meg DIMM in J3 (second slot from the top).

David

We've got just about everything form LJ4 and 5Si's to LJ5550's. The problem is only related to the older Jetdirect cards and pdf files. Office, Lotus Notes, and other apps that we use don't have any...

Well, as it turns out it was the DIMM in slot #1. I pulled the DIMM from slot #1 out and the error message disappeared. I then swapped it with the DIMM in slot two and got a 49.2.xx error during...

Anyone else having problems with 600n and 610n network cards with the new Adobe (ver. 9.x)? We are having to replace them with newer (620n or petter) JetDirect Cards. We keep getting 81.xxx errors...

HP has a known problem with the magenta on the 4700's. They have sent us replacement boards for printers that were dumpimg magenta toner and failing to calibrate properly.

DavidM

I've got a LJ4100TDN that is giving a 49.1.128 error. I know that the 49 pertains to the formatter board, but I don't know what the .1.128 references. I can't find anything in service manual, so...