7. If hardware has recently been installed, remove it and determine whether the computer functions properly.
8. If software has recently been installed, uninstall it and determine whether the computer functions
properly.
9. If the screen is blank, conrm the display choice by pressing Windows logo + p and set to screen only.
Or plug an external monitor into a dierent video port on the computer, if one is available, and close the
computer lid.
10. Verify that the latest version of BIOS, drivers, and software are installed. A new release might support new
features or
x the problem.
11. Press the caps lock or num lk key. If the caps lock or num lk light toggles on or o, the keyboard is likely
operating correctly.
12. Press the touchpad On/O button light. If the light toggles on or o, the touchpad is likely operating
correctly.
Consulting with HP Service
If further HP support is required, this information may be requested when you call. So it may be helpful to take
notes.
● Technical support registration number (if applicable)
● Product serial number
● Product model name and number
● Product identication number
● Applicable error messages
● Add-on boards or hardware
● Third-party hardware or software
● Operating system type and revision level
122 Chapter 7 Troubleshooting guide ENWW
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