HP Z VR Backpack G1 - Fan Runs Constantly

Fan runs constantly
Items Procedures
Symptoms
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Fan never stops running
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Generates heat
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Decreased computer performance
Possible causes
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BIOS not up to date.
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Thermal condition (fan, air ow)--fan may not be defective but must run constantly to
remove excess heat generated by electrical components.
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Inappropriate conguration.
Troubleshooting steps
General actions
1. Verify whether BIOS is set to Fan Always on while on AC Power F10 Setup. When booting
the computer, press F10 to open Setup, and then select Advanced > Built-In Device
Options Menu.
2. Update BIOS and drivers (4. Update BIOS and drivers on page 34) and reset BIOS to
default. BIOS may implement new fan characteristics and updates for other components.
3. Perform a hard reset (8. Hard reset on page 41). Performing a hard reset can reset
recorded thermal values in memory.
Thermal-related issue
1. Verify fan is spinning. Reseat fan cable before moving to next step.
a. Check fan and connection. Reseat fan cable.
b. Be sure that no obstructions or dust are in heat sink fan, heat sink n, or vent.
c. Test fan using HP PC Hardware Diagnostics (UEFI) tool (6. HP Hardware Diagnostics
and Tools on page 35). Be sure that the fan is not producing loud noise and that fan
blades spin correctly.
d. Test with a veried working fan.
e. Replace the fan.
2. Verify thermal solution
Use Thermal Monitor tool (available only to authorized service providers/technicians)(HP
Thermal Monitor on page 38) to run stress test (processor and GPU) and verify that
thermal sensors are within limits after thermal condition is serviced.
User conguration
Change Power Options in Windows (i.e., choosing Balanced mode instead of High
performance). High performance and extensive graphics may cause the fan run constantly to
release the heat.
Notes BIOS currently omits fan presence detection to shorten boot time delay less than four seconds.
Therefore, the fan error is generated based on previous boot to operating system that found
system fan error.
Fan often is part of thermal solution, including heat sink, heat sink n/muer, and thermal
grease. Fan replacement requires reboot and fan function verication using HP PC Hardware
Diagnostics (UEFI) tool.
82 Chapter 7 Troubleshooting guide