Hi,
After sending it off, did HP say which part snapped? I'm having a very similar problem but with a 2600n. The original symptom, was faded magenta, I read this up and it turned out to be a dusty laser mirror for the magenta. I fixed this, but a couple days later the user reported that there is an error message saying 'Jam in print paper path', had a look for myself, my only guess is the sensor for paper jams is faulty or disconnected.
Any ideas anyone?
Thanks.