HP Z400 H2D81US, VA799UT 799UT#ABA manual CPU Overtemp Insufficient processor cooling or

Table 6-10POST error messages (continued)

Screen message	Probable cause	Recommended action
515—CPU Overtemp	Insufficient processor cooling or	1.	If necessary, add a heatsink to the processor and
occurred	processor defect.		ensure proper operation.
		2.	Replace the processor.
516—Chipset fan not detected	Chipset fan missing, disconnected, or	1.	Ensure that the fan is installed and connected
	defective.		properly.
		2.	Replace the fan.
517—Low power CPU	Inadequate heatsink is installed.	Replace the low power heatsink with a high power
heatsink(s) detected for high		heatsink.
power CPUs
518—Power supply wattage	Workstation configuration requires	●	Reduce the workstation power consumption.
insufficient for hardware	more power than the power supply can	●	Replace the power supply with a high output
configuration	provide.		power supply.
601—Diskette Controller Error	Diskette controller circuitry or diskette	1.	Run the Computer Setup (F10) utility.
	drive circuitry incorrect.	2.	Verify cabling and replace defective cables if
			necessary.
		3.	Clear CMOS.
		4.	Replace the diskette drive.
		5.	Replace the system board.
605—Diskette Drive Type	Mismatch in drive type.	1.	Run the Computer Setup (F10) Utility.
Error		2.	Disconnect any other diskette controller devices
			(tape drives).
		3.	Clear the CMOS.
610—External Storage Device	External storage device is not	1.	Verify that the external device is present and
Failure	detected, is improperly connected, or		connected properly.
	is defective.	2.	Replace the external device.
611—Primary Floppy Port	The flexible disk drive is configured at	Select a new address for the flexible disk drive.
Address Assignment Conflict	a previously assigned address.
912—Computer Cover Has	N/A	No action required.
Been Removed Since Last
System Start Up
914— Hood Lock Coil is not	Mechanism is missing or is not	1.	Reconnect or replace the missing mechanism.
Connected	connected.	2.	Reseat or replace the missing mechanism cable.
916—Power Button Not	Power button cable is disconnected	Reconnect the cable and restart.
Connected	from the system board.
917—Front Audio Not	Front Audio mechanism is missing or	1.	Replace or reconnect the missing front audio
Connected	is not connected.		mechanism to the system board.
		2.	Reseat or replace the missing mechanism cable.

918—Front USB Not	Front USB mechanism is missing or is
Connected	not connected.

1.Replace or reconnect the missing Front USB mechanism to the system board..

2.Reseat or replace the missing mechanism cable.

142 Chapter 6 Diagnostics and troubleshooting ENWW