Compaq dc5850 Service Reference Guide: HP Compaq dc5850 Business PC - Page 189
POST Numeric Codes and Text Messages - motherboard
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Table C-1 Numeric Codes and Text Messages (continued) Control panel message Description Recommended action 304-Keyboard or System Unit Error Keyboard failure. 1. Reconnect the keyboard with computer turned off. 2. Ensure that none of the keys are depressed. 3. Replace the keyboard. 4. Replace the system board. 501-Display Adapter Failure Graphics display controller. 1. Reseat the graphics card (if applicable). 2. Clear CMOS. 3. Verify monitor is attached and turned on. 4. Replace the graphics card (if possible). 510-Flash Screen Image Corrupted Flash Screen image has errors. Reflash the system ROM with the latest BIOS image. 511-CPU, CPUA, or CPUB Fan not Detected CPU fan is not connected or may have malfunctioned. 1. Reseat CPU fan. 2. Reseat fan cable. 3. Replace CPU fan. 512-Chassis, Rear Chassis, or Front Chassis Chassis, rear chassis, or front chassis fan is 1. Reseat chassis, rear chassis, or front Fan not Detected not connected or may have malfunctioned. chassis fan. 2. Reseat fan cable. 3. Replace chassis, rear chassis, or front chassis fan. 601-Diskette Controller Error Diskette controller circuitry or floppy drive circuitry incorrect. 1. Run Computer Setup. 2. Check and/or replace cables. 3. Clear CMOS. 4. Replace diskette drive. 5. Replace the system board. 605-Diskette Drive Type Error Mismatch in drive type. 1. Run Computer Setup. 2. Disconnect any other diskette controller devices (tape drives). 3. Clear CMOS. 917-Front Audio Not Connected Front audio harness has been detached or Reconnect or replace front audio harness. unseated from motherboard. 918-Front USB Not Connected Front USB harness has been detached or unseated from motherboard. Reconnect or replace front USB harness. 921-Device in PCI Express slot failed to initialize There is an incompatibility/problem with this device and the system or PCI Express Link could not be retrained to an x1. Try rebooting the system. If the error reoccurs, the device may not work with this system POST Numeric Codes and Text Messages 177