Table 5-2. Service and error messages Light status Description Recommended action Incompatible DIMM Error (Accessory Error). Remove DIMM and power cycle. If error persists, replace formatter. Document Scan Engine Error. 1. Unplug the printer, remove and reattach the laser scanner, and then replug the printer. 2. Replace the document scanner unit. Document Scan Engine NVRAM Error. 1. Unplug the printer, remove and reattach the laser scanner, and then replug the printer. 2. Replace the laser scanner unit. 124 Troubleshooting/Maintenance C4224-90962