hp p2055dn printer stuck in initializing

I'm feeling like I'm stuck in limbo here :confused: If the above fails I guess we'll try returning one of the printers to HP to see if they can do anything with it? I'll run some more checks as it looks like there might be some firewall settings on the printer which can limit communication to it for only a fixed number of IP addresses. So we've go 10 potentially dodgy printers, past the 30 day return window, and all HP's support can suggest is to reset the BIOS to factory defaults. That and it's a problem which isn't affecting any other printers apart from the P2055DN's It's really frustrating because if it now only happens once a week it's going to be near impossible to diagnose the fault in anything like a workable time frame. At the same time I'm curious to see if they update the firmware or change the onboard NIC after returning it? They've not volunteered any of these solutions as a potential fix over the phone though. Given it may not necessarily be a fault with the printer they could potentially charge us for the return of it. I ended up cancelling the return of the printer until we get a chance to run more tests just to confirm it's a fault with the printer and not something on our network. So the above seems to have improved the situation but we're still kind of in the dark as to the cause of the probem unfortunately. So far the printer's now lasted a week before apparently going offline (this has been mentioned to us by one of our staff but would like to confirm it's happening after witnessing it ourselves!). We've tried disabling all of the network management protocols on the printer apart from SNMP and the '9100' print services protocol both of which appear to be required. So at the moment it's looking like it's some kind of randomly occuring traffic on our network that's causing the issue :(

We plugged the printer into a standalone network switch with only it and another PC connected and couldnt replicate the fault.

Just to update this thread we've been running some more tests and it turns out it may not be enitirely HP's fault (though their tech support's about as much help as a chocolate teapot).

Hp p2055dn printer stuck in initializing