HP 4000 Maintenance & Service Guide HP Compaq 4000 Pro Small Form Factor B - Page 115
Numeric Codes and Text Messages continued, Table C-1
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Table C-1 Numeric Codes and Text Messages (continued) Control panel message Description Recommended action 303-Keyboard Controller Error I/O board keyboard controller. 1. Reconnect keyboard with computer turned off. 2. Replace the system board. 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. (See Password Security and Resetting CMOS on page 157.) 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. 513-Front Chassis fan not detected Front chassis fan is not connected or may have malfunctioned. 1. Reseat front chassis fan. 2. Reseat fan cable. 3. Replace front chassis fan. 515-Power Supply fan not detected Power supply fan is not connected or may have malfunctioned. 1. Reseat power supply fan. 2. Reseat fan cable. 3. Replace power supply fan. 660-Display cache is detected unreliable Integrated graphics controller display cache Replace system board if minimal graphics is not working properly and will be disabled. degrading is an issue. 912-Computer Cover Has Been Removed Since Last System Startup Computer cover was removed since last system startup. No action required. 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 105
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