Fan Runs Constantly - HP ZBook x2 Manual

Fan runs constantly

Items
Symptoms
Fan never stops running
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Generates heat
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● Decreased computer performance
Notes
Procedures
Possible causes
BIOS not up to date.
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Thermal condition (fan, air flow)--fan may not be defective but must run
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constantly to remove excess heat generated by electrical components.
Inappropriate configuration.
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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
Advanced > Built-In Device Options Menu.
2. Update BIOS and drivers (4. Update BIOS and drivers on page
BIOS to default. BIOS may implement new fan characteristics and updates for
other components.
3. Perform a hard reset (8. Hard reset on page
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 fin, or
vent.
c. Test fan using HP PC Hardware Diagnostics (UEFI) tool
Diagnostics and Tools on page
loud noise and that fan blades spin correctly.
d. Test with a verified 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
GPU) and verify that thermal sensors are within limits after thermal condition
is serviced.
User configuration
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.
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 fin/muffler, and
thermal grease. Fan replacement requires reboot and fan function verification using
HP PC Hardware Diagnostics (UEFI) tool.
For more information, see the following links:
http://support.hp.com/us-en/document/c01007591.
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● https://support.hp.com/us-en/document/c01657439.
F10 to open Setup, and then select
70). Performing a hard reset can
64). Be sure that the fan is not producing
67) to run stress test (processor and
Common issues and possible solutions 117
63) and reset
(6. HP Hardware