Service Manual
Page 45
... 2-22. 959.05 Unknown boot failure Update firmware and call the next level of support, or replace the controller board. Program the download emulation into the firmware card again. Replace the memory card. 964.xx Download Emulation Cyclic Redundancy Check Error: checksum failure detected... Replace the controller board. If this does not resolve the problem, then replace the firmware card and download the emulation again. EEPROM retention error Replace the controller board. Disable the Download Emulation. See "Controller board service check" on page 2-22. 961.xx RAM memory...
... 2-22. 959.05 Unknown boot failure Update firmware and call the next level of support, or replace the controller board. Program the download emulation into the firmware card again. Replace the memory card. 964.xx Download Emulation Cyclic Redundancy Check Error: checksum failure detected... Replace the controller board. If this does not resolve the problem, then replace the firmware card and download the emulation again. EEPROM retention error Replace the controller board. Disable the Download Emulation. See "Controller board service check" on page 2-22. 961.xx RAM memory...