HP DC5100 Troubleshooting Guide - Page 70
run Computer Setup or Windows - motherboard
UPC - 072000919491
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POST Error Messages Numeric Codes and Text Messages (Continued) Code/Message Probable Cause Recommended Action 912-Computer Cover Has Been Removed Since Last System Startup Computer cover was removed since last system startup. No action required. 914-Hood Lock Coil is not Connected Smart Cover Lock mechanism is missing or not connected. 1. Reconnect or replace hood locking mechanism. 2. Reseat or replace hood locking mechanism cable. 916-Power Button Not Connected 917-Front Audio Not Connected 918-Front USB Not Connected 919-Multi-Bay Riser not Connected 1151-Serial Port A Address Conflict Detected Power button harness has been detached or unseated from motherboard. Front audio harness has been detached or unseated from motherboard. Front USB harness has been detached or unseated from motherboard. Riser card has been removed or has not been reinstalled properly in the system. Both external and internal serial ports are assigned to COM1. Reconnect or replace power button harness. Reconnect or replace front audio harness. Reconnect or replace front USB harness. Reinsert riser card. 1. Remove any serial port expansion cards. 2. Clear CMOS. (See Appendix B, "Password Security and Resetting CMOS.") 3. Reconfigure card resources and/or run Computer Setup or Windows utilities. A-8 www.hp.com Troubleshooting Guide