HP LaserJet 5p/mp Service Manual - Page 165

HP LaserJet 5P/5MP, 6P/6MP Printer Service Supplement Troubleshooting Continuable Data Error Light Patterns Possible data error light patterns are listed in the first column of the following table. If the Error and Data lights on the Status Panel are lit, simultaneously press the GO and RESET/JOB CANCEL buttons on the printer to display a secondary light pattern. This secondary light pattern, or data error light pattern, will more precisely describe the problem. Where more than one data error light pattern is possible, corresponding computer messages are listed in the second column. Data Error Light Pattern Computer 5P/5MP 6P/6MP Message Description & Recommended Action 20 MEM OVERFLOW Too much data, or data too complex. Turn Page Protection ON or to AUTO (can be set within the Remote Control Panel). 2. Add optional memory. 3. Reduce the complexity of the print job. Press GO to resume printing. 21 PRINT OVERRUN 22 IO ERROR The computer and printer are not communicating because of improper signal protocols. Indicates a loose cable connection or a bad or poor quality cable. Reseat the cable and make sure you are using a high-quality cable 62