Table 7-47 Issues, possible causes, and fixes
Items Procedures
Symptoms
● POST error message: Boot
Device not found (3F0)
● Hang when booting to operating
system
Possible causes
Operating system, loose connection, faulty hard drive, BIOS configuration, Secure Boot.
Troubleshooting steps
1. Verify whether Secure Boot is enabled in BIOS. Secure Boot prevents legacy boot
devices from starting the computer, including bootable CDs and DVDs. For more
information, see http://support.hp.com/us-en/document/c03653226.
2. Reset BIOS to default. Be sure that BIOS Boot Mode in Boot Option is set up
properly for bootable device and its operating system (for example, UEFI Native for
Windows 8).
Another example, choosing Legacy Boot Order for an UEFI device causes "Boot
Device not found (3F0)" error.
3. Verify hard drive connection and flex cable. Reseat connection. For multiple
storage devices, keep the primary drive with the operating system and remove
other devices.
4. Use PC Hardware Diagnostics tool to test. Record failure code and have the hard
drive replaced.
5. If there is no error, reinstall the operating system using HP Restore.
6. Test with a verified working operating system hard drive, if available.
Note If there is a hard drive POST error message, see POST error messages and user actions
on page 136.
Read-write error
Use this information to troubleshoot read and write errors.
Table 7-48
Issues, possible causes, and fixes
Items Procedures
Symptoms
● POST error message (for
example, error code 301)
● Hang when working on data,
files, documents
Possible causes
Loose connection, faulty hardware.
Troubleshooting steps
1. Perform a hard reset (8. Hard reset on page 84).
2. Reset BIOS to default (9. Soft reset (Default Settings) on page 85).
3. Verify the drive connection and flex cable. Reseat connection (10. Reseat cables
and connections on page 85).
4. Use the HP Hardware Diagnostics tool to test. If failed, record failure code and have
the hard drive replaced.
5. If no error with HP PC Hardware Diagnostics (UEFI) tool, try to repair the hard drive
and its files in Windows (using command “CHKDSK /f /r /x”). Use HP Restore
to reinstall the operating system, if needed.
6. Test with a verified working hard drive. If it is not recognized, the system board is
faulty.
Read-write error
127
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