NOTE:
Some company policies prohibit updates or changes. Check whether the computer has custom BIOS
settings before taking action.
To load BIOS to default settings: Reboot the computer, and then press f10 > Main > Restore defaults. For more
information, see
, and the search for BIOS Setup Utility Information and Menu Options.
10. Reseat cables and connections
Many problems are caused by improper connections or loose connections because of abnormal movement
and vibration.
NOTE:
Before disassembling the computer to reseat cables and connections, always disconnect power and
remove the battery, or disconnect a nonremovable battery.
See
and
for suggested cable management
practices when you remove and install components.
You can access and reseat connections for Customer Self-Repair (CSR) parts. Examples of reseating hardware
include:
●
Reseating the battery into the battery bay can resolve no-battery found and no-charging issues.
●
Reseating memory modules can resolve memory error, no-boot, and blue screen issues.
●
Reseating the hard drive can resolve a POST error 3F0 (no boot device) issue (see
●
Reseating the keyboard cable can resolve an unrecognized keys error.
●
Reseating the wireless module and antenna cable can resolve a wireless connection issue.
For field replaceable units (FRUs), authorized service providers can try the following steps. For more
information, see
Removal and replacement procedures for authorized service provider parts on page 42
●
Reseating the fan cable can fix POST error 90B (no fan detected) issue (see
).
●
Reseating the power cable can fix a no-boot issue.
●
Reseating the daughterboards can resolve their functional issues. Some models may have items such as a
power button board, VGA board, and others.
●
Reseating graphics cables and panel connectors can fix distorted or flickering video.
●
Replacing thermal pads may resolve thermal power-down issue.
11. Test with minimum configuration
The factory-shipped computer (hardware configuration and preinstalled operating system image) is well
tested and ready for use. Therefore, using the original factory hardware configuration or booting to operating
system safe mode often resolves issues quickly.
●
Disconnect any external USB storage, remove any discs in optical drives, remove the computer from a
docking station, remove external video, and others.
●
In addition to removing recently added components, you can narrow the issue down further with a
minimum configuration. For example, if HP PC Diagnostics reports a memory error, test one memory
module at a time to isolate the defective module.
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Chapter 7 Troubleshooting guide
