Table 6-16 Issues, possible causes, and fixes
Items Procedures
Symptoms
Lights blink on keyboard caps
lock/num lock keys
Possible causes
Blinking lights on startup usually indicate a problem with basic functionality of a critical
component (processor, BIOS, graphics cards, memory, and so on) because of a loose
connection, defective parts, or recently added parts.
Troubleshooting steps
1. Check for any blink patterns. Count the number of blinks in a sequence, followed by
a pause for a few seconds.
2. See status, blinking lights, and error message (7. Status lights, blinking light codes,
troubleshooting lights, and POST error messages on page 76) for corrective
actions.
3. If internal hardware components (such as memory, hard drive) have been recently
added, a component may not be connected properly. Remove and reseat new
components (10. Reseat cables and connections on page 80) one at a time.
Note Because the display might not be functional, lights are used to indicate an error.
Diagnostic error messages
Use the information in the table to help you understand diagnostic error messages.
Table 6-17
Issues, possible causes, and fixes
Items Procedures
Symptoms
● Computer has power
● POST error message displays
(Windows logo has not yet
appeared)
Possible causes
Diagnostic error messages indicate a problem. There may be a problem with the
instruction being sent from the BIOS to a hardware component (for example, keyboard
failures), or incompatible hardware. Can usually be resolved by installing updated
firmware for the component.
Troubleshooting steps
1. See 7. Status lights, blinking light codes, troubleshooting lights, and POST error
messages on page 76 for corrective actions. An example of a POST error
message might be "Boot Device Not Found."
2. If there is power, you might be able to access BIOS. Reset BIOS to its default
condition. (9. Soft reset (Default Settings) on page 80)
3. Restore hardware to its original condition (for example, bootable solid-state drive
instead of hard drive).
4. Reseat suspected components and verify connection.
5. Test suspected components using HP PC Hardware Diagnostics (UEFI) tool.
Note An Error Message means that the system has finished BIOS hardware validation and
is ready to launch the Startup Menu. To access the Startup Menu for further options,
press the esc key while restarting the computer.
BIOS password
Use the information in the table to troubleshoot BIOS password issues.
Diagnostic error messages
95
To Next Page
Loading...
Need help?
General
