HP ProBook 630 Maintenance and Service Guide - Page 110

Fan runs constantly, Table 7-50

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Table 7-50 Issues, possible causes, and fixes (continued) Items Procedures 2. Determine whether the noise comes from AC power adapter. Test with a verified working AC adapter. Disconnect external devices and all cables connected to the computer to isolate issue to computer only. Noisy fan Determine whether the noise comes from the fan. Disconnect the fan briefly to isolate whether noise originates from fan. If noise is absent with fan disconnected, see Fan runs constantly on page 98. Noisy hard drive Determine whether the noise comes from the hard drive. See Noisy hard drive on page 97. Noisy optical drive 1. Determine whether the noise comes from an optical drive. 2. Remove CD/DVD from the optical drive. Noisy speaker 1. Determine whether the noise comes from speaker. 2. Test with a verified working external headset/speaker. Noisy display Determine whether the noise comes from display panel (humming noise). Change display frequency settings. See Display on page 79. The section below is intended for authorized service providers and technicians. 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. Fan runs constantly Use this information to troubleshoot a constantly running fan. Table 7-51 Issues, possible causes, and fixes Items Procedures Symptoms ● Fan never stops running ● Generates heat ● Decreased computer performance 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 52) and reset BIOS to default. BIOS can implement new fan characteristics and updates for other components. 3. Perform a hard reset (8. Hard reset on page 58). Performing a hard reset can reset recorded thermal values in memory. 98 Chapter 7 Troubleshooting guide

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Table 7-50
Issues, possible causes, and fixes (continued)
Items
Procedures
2.
Determine whether the noise comes from AC power adapter. Test with a verified
working AC adapter.
Disconnect external devices and all cables connected to the computer to isolate issue to
computer only.
Noisy fan
Determine whether the noise comes from the fan. Disconnect the fan briefly to isolate
whether noise originates from fan. If noise is absent with fan disconnected, see
Fan runs
constantly
on page
98
.
Noisy hard drive
Determine whether the noise comes from the hard drive.
See
Noisy hard drive
on page
97
.
Noisy optical drive
1.
Determine whether the noise comes from an optical drive.
2.
Remove CD/DVD from the optical drive.
Noisy speaker
1.
Determine whether the noise comes from speaker.
2.
Test with a verified working external headset/speaker.
Noisy display
Determine whether the noise comes from display panel (humming noise). Change display
frequency settings. See
Display
on page
79
.
The section below is intended for authorized service providers and technicians.
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.
Fan runs constantly
Use this information to troubleshoot a constantly running fan.
Table 7-51
Issues, possible causes, and fixes
Items
Procedures
Symptoms
●
Fan never stops running
●
Generates heat
●
Decreased computer
performance
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
52
) and reset BIOS to
default. BIOS can implement new fan characteristics and updates for other
components.
3.
Perform a hard reset (
8. Hard reset
on page
58
). Performing a hard reset can reset
recorded thermal values in memory.
98
Chapter 7
Troubleshooting guide