49.xxx errors are typically caused by a corrupt print job stuck in the print queue. Fastest way to test for this: 1. Turn off printer. 2. Unplug data cable (USB/Network) from printer. 3. Turn printer on. Is there a 49.xxx error, or does the printer boot to a ready state? If it boots to a ready state, print an internal print (Config Report, etc...) If it prints that with no issue, then plug the data cable back into the printer and see if the 49.xxx error returns. If the 49.xxx error returns after all that, then it's a job that is corrupt. Go clear the print queue for every printer and/or print server for that printer.
Note: If you get a 49.xxx error with the data cable UNPLUGGED, then the formatter is likely the issue and will need to be replaced.