Before we proceed, a mandatory disclaimer:
| Problem | Likely Cause | Solution | |---------|--------------|----------| | USB not recognized | Wrong folder name or file structure | Ensure exact romdata folder; files not in subfolders. | | Update fails at 50% | Corrupt firmware file | Redownload firmware; reformat USB. | | Machine freezes after update | Incomplete update or module mismatch | Turn off, wait 30s, power on. If stuck, call service. | | Fax/print functions missing after update | Fax firmware not updated | Re-run update with fax module file. | | SC code (e.g., SC899, SC672) | Firmware mismatch or bad flash | Enter SP mode and reflash system module. | ricoh mp 5055 firmware update