IBM 6500-V5P Maintenance Manual - Page 134

Operator Panel Message 175 ACCESS NULL POINTER* SEE USERS MANUAL Display Messages Table 3. Message List Explanation Corrective Action The processor tried to access a pointer that contains nothing (null). 1. Cycle power. Run the print job again. If the message appears, download the latest code from IBM First (page 231). If the message appears, replace the flash memory with blank flash containing boot code. 2. Load flash memory (page 238). 3. If the message appears, the controller board or microcode is suspect. Do the following: 4. Save the printer configuration values. (Refer to the User's Manual.) 5. Clear NVRAM (page 237). 6. Download and install the latest code from IBM First (page 231). 7. Power on the printer in download mode and load flash memory (page 238). a. If you encounter loading problems, go to the appropriate error code for resolution. b. If you encounter the failure or message that brought you to this procedure, replace the controller board (page 319). After replacing the controller board, DO NOT make the printer READY, but proceed immediately to the next step. 8. Download and install the latest code from IBM First (page 231). 9. Power on the printer in download mode and load flash memory (page 238). 10. If you encounter the failure after replacing the controller board, reinstall the original controller board and contact your DDS and Second Level Support 134