HP Dc7900 Troubleshooting Guide - Page 59

POST Numeric Codes and Text Messages

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Table A-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. (See Appendix B, Password Security and Resetting CMOS on page 61.) 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. 514-CPU or Chassis Fan not Detected CPU or chassis fan is not connected or may 1. Reseat CPU or chassis fan. have malfunctioned. 2. Reseat fan cable. 3. Replace CPU or chassis fan. 601-Diskette Controller Error Diskette controller circuitry or floppy drive circuitry incorrect. 1. Check and/or replace cables. 2. Clear CMOS. (See Appendix B, Password Security and Resetting CMOS on page 61.) 3. Replace diskette drive. 4. Replace the system board. 605-Diskette Drive Type Error Mismatch in drive type. 1. Disconnect any other diskette controller devices (tape drives). 2. Clear CMOS. (See Appendix B, Password Security and Resetting CMOS on page 61.) 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. ENWW POST Numeric Codes and Text Messages 53

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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. (See Appendix B,
Password Security and Resetting
CMOS
on page
61
.)
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
Fan not Detected
Chassis, rear chassis, or front chassis fan is
not connected or may have malfunctioned.
1.
Reseat chassis, rear chassis, or front
chassis fan.
2.
Reseat fan cable.
3.
Replace chassis, rear chassis, or front
chassis fan.
514-CPU or Chassis Fan not Detected
CPU or chassis fan is not connected or may
have malfunctioned.
1.
Reseat CPU or chassis fan.
2.
Reseat fan cable.
3.
Replace CPU or chassis fan.
601-Diskette Controller Error
Diskette controller circuitry or floppy drive
circuitry incorrect.
1.
Check and/or replace cables.
2.
Clear CMOS. (See Appendix B,
Password Security and Resetting
CMOS
on page
61
.)
3.
Replace diskette drive.
4.
Replace the system board.
605-Diskette Drive Type Error
Mismatch in drive type.
1.
Disconnect any other diskette controller
devices (tape drives).
2.
Clear CMOS. (See Appendix B,
Password Security and Resetting
CMOS
on page
61
.)
660-Display cache is detected unreliable
Integrated graphics controller display cache
is not working properly and will be disabled.
Replace system board if minimal graphics
degrading is an issue.
Table A-1
Numeric Codes and Text Messages (continued)
ENWW
POST Numeric Codes and Text Messages
53