Startup Problem When Option Cards Installed

This Field Change Order (FCO) details necessary upgrades for specific DECpos units that have power supply revision 'D01' or 'E01' and require modifications to achieve 'B04' system revision. These upgrades include replacing the logic card, I/O card, power supply, and keyboard to resolve startup failures and keyboard bounce issues. The document provides detailed step-by-step instructions for hardware replacement, component verification, and required reporting procedures.