Laserjet PRO 400 49 service error

[rburkeairmar]

I work IT for a company and support hundreds of PCs, printers, networks and related hardware. 

On Thursday one of our networked Laserjet pro 400's said 49 service error and went into a boot loop. I swapped it with another pro 400 and got the same result. I took a walk around the building we call "west" and every single networked pro 400 had the same issue. I checked the building we call "east" that has 2 of these printers networked and they were fine. Back in west I could get it to operate normally disconnected from the network. I moved a west error printer to East and it worked normally. I then took this printer to our "north" building and it worked fine there too. I plugged this printer directly into my laptop ethernet port to give it a 169 IP and access the GUI. I updated the firmware and still had the same error when reconnected to the west network. But these printers working fine in the other buildings tells me it's not firmware. 

Something must have changed in our west network that these printers do not like. In west we have like 10 other HP printers that are different models but they work fine. I saw a post somewhere else that said to disable the ipv6 but that didn't change anything. I manually applied the IP address that I had reserved. That didn't change anything. Has anyone experienced this before? Did you make a network change that disabled only one model of HP printer? Maybe a forced update to your networking hardware?

Any help would be greatly appreciated.

[Valsimot]

When you swap the printers did you use the same IP address or hostname ? Probably someone within the company sent a print job to that printer ( IP address) that printer is unable to print and you get a 49 error. You need to check the print server is there and print jobs that are not a printer or print job in state error. If yes cancel that job and everything will probably be fine again.

[rburkeairmar]

Different IP and host name. Actually the printer I swapped wasnt on the network previously. The first thing I did before swapping the printers was remove the print job we assumed was the issue. 

This isnt a single printer issue. Its all of the Laserjet PRO 400's we have in the building. Every single one is showing 49 service error and boot looping until disconnected from the network.