I'm wondering how to repair a 49. 4C06 Service error

Hi and welcome to Fixya!

Most 49.XXXX errors usually indicate a firmware error. The firmware requires updating. You can do this by visiting hp.com and downloading the proper version firmware.

You can send the firmware update simply by downloading a version of a print to file software. This is by far the easiest way to send the file to the printer in my opinion. Even if the printer is networked, you can easily perform this update. DO NOT disconnect, power down, or send anything to the printer while the update is downloading.

Let me know if you have further questions.

Have a good one!

See if the error is only occuring with a particular application or certain documents. Most times the error is related to the use of Adobe. If you have a network and are using a print server for all the printers, then the first thing I would do is load one of the problem printers locally on one or more pc's using tcp/ip and the driver being loaded on the local machine. See if you still have the issue. If not, then the print server may be causing issues. If you still have the issue, especially with the 4250, then I would contact hp tech support. Keep in mind if it is only happening with a certain application, HP will tell you to contact that vendor. One other note is that I have seen this type of error of the 4200 and 4300 series when users were printing lots of documents with foreign language characters in them. On those, though the firmware upgrade solved the isse.