1. Restart the computer.
2. Press and hold the F8 key before the operating system starts to display the Advanced Boot Options screen.
3. Use the arrow keys to highlight Last Known Good Configuration, and then press Enter to boot the computer.
If you encounter issues
Boot the computer to Safe Mode to see if it will boot without all of the drivers loaded. To boot to Safe Mode:
If you recently installed new software, uninstall the software.
● If you recently added new hardware, remove the hardware.
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If your problem is not resolved, the network jack on your computer or the network wall jack might be faulty.

5.Select your specific computer model.

6.Select your operating system.

7.In the Diagnostic section, click the HP UEFI Support Environment link. This link provides additional information.

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Click the Download button and select Run. The download includes instructions (in English) on how to install the tools on the USB device.

NOTE: HP diagnostic solutions are developed to test components typically included on HP products. They may not diagnose all third-party accessories that can be added to the system.

Before you call for technical support

WARNING! When the computer is plugged into an AC power source, voltage is always applied to the system board. To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to disconnect the power cord from the wall outlet and allow the internal system components to cool before you touch them.

If you are having problems with the computer, try the appropriate solutions as described in the previous sections and summarized below to try to isolate the exact problem before calling for technical support.

●Check the power LED on the front of the computer to see if it is flashing and listen for a series of beeps emanating from the computer. The flashing lights and/or beeps are error codes that will help you diagnose the problem. Refer to the Maintenance and Service Guide (English only) for details.

●If the screen is blank, plug the monitor into a different video port on the computer if one is available. Or, replace the monitor with a monitor that you know is functioning properly.

●If you are working on a network:

◦Use a different network cable to connect your computer to the network.

◦Connect a different computer with a different cable to the network.

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