Canon LBP253 SM Manual page 134

Alarm Code Title
85-0003 System error
85-0004 System error
85-0005 System error
A. Operation / B. Cause / C. Action
Contact the sales company.
Auto recovery due to replacement with a new Main Controller PCB, which is a service part.
Auto recovery due to replacement with a used Main Controller PCB.
127
6. Error/Jam/Alarm