Fan Runs Constantly - HP Elite x2 G8 Maintenance And Service Manual

Table 7-51 Issues, possible causes, and fixes (continued)
Items
Noisy hard drive
Noisy optical drive
Noisy speaker
Noisy display
The section below is intended for authorized service providers and technicians.

Fan runs constantly

Use this information to troubleshoot a constantly running fan.
Table 7-52 Issues, possible causes, and fixes
Items
Symptoms
Fan never stops running
●
Generates heat
●
Decreased computer
●
performance
122 Chapter 7 Troubleshooting guide
Procedures
Determine whether the noise comes from the hard drive.
See Noisy hard drive on page 120.
1. Determine whether the noise comes from an optical drive.
2. Remove CD/DVD from the optical drive.
1. Determine whether the noise comes from speaker.
2. Test with a verified working external headset/speaker.
Determine whether the noise comes from display panel (humming noise). Change display
frequency settings. See Display on page
1. After disassembling the chassis, inspect components of the interior for excessive wear
or damage.
2. If noise issues persist, proceed with process of elimination for battery, AC adapter, or
boards.
Procedures
Possible causes
BIOS not up to date.
●
Thermal condition (fan, air flow)—fan might not be defective but must run constantly
●
to remove excess heat generated by electrical components.
Inappropriate configuration.
●
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
to default. BIOS can implement new fan characteristics and updates for other
components.
3. Perform a hard reset (8. Hard reset on page
recorded thermal values in memory.
Thermal-related issue
1. Verify that fan is spinning. Reseat fan cable before moving to next step.
Check fan and connection. Reseat fan cable.
a.
Be sure that no obstructions or dust are in heat sink fan, heat sink fin, or vent.
b.
102.
72) and reset BIOS
78). Performing a hard reset can reset