OKI MPS420d Error Codes list and solutions – Compatible Printer model: OKI MPS420d – OKI MPS420d Error Code description: Code: 001 Description: Machine Check Exception Troubleshooting Guides: Code: 002 Description: DSI Exception (Data read failure) Troubleshooting Guides: Code: 003 Description: ISI Exception (Instruction read failure) Troubleshooting Guides: Code: 004 Description: Alignment Exception (Memory access error) […]