If the 900 error occurs only when the printer is receiving information from a network or computer, you should contact your software/network support.
 
If the error occurs when the printer is idle or not connected to the network or PC, there may be a printer hardware or connection problem. Sometimes a bad connection with an Internal Network Adapter/Network Card can cause the problem.
 
For troubleshooting information, visit the Error: "900 Service RIP Software" link below.