Patent ID: 7342675

Claim:
A printing device, comprising: a printing device power supply that provides an electrical current to the printing device; a master module to facilitate troubleshooting of the printing device when the electrical current from the printing device power supply to the printing device is interrupted; the master module including master module memory, a communications program module, and a master module power source; printing device memory that includes a print processing program module and an error processing program module; the print processing program module to perform printing functions of the printing device, and the error processing program module to store at least one error message in the master module memory; and a port to transmit memory contents; wherein the master module power source is to supply electricity to the master module to persist the at least one error message in the master module memory if the electrical current from the printing device power supply to the printing device is interrupted; and wherein the communications program module is to dump the at least one error message from the master module memory via the port while the electrical current from the printing device power supply to the printing device is interrupted by using the master module power source.