Maintenance and Service Guide
Table Of Contents
- Product description
- Components
- Illustrated parts catalog
- Removal and replacement procedures preliminary requirements
- Removal and replacement procedures for Customer Self-Repair parts
- Removal and replacement procedures for authorized service provider parts
- Interpreting system validation diagnostic front panel LEDs and audible codes
- Troubleshooting guide
- Resources
- General troubleshooting steps
- Identify the issue
- Analyze the issue
- Resolve the issue
- Verify solution
- Helpful Hints
- Common issues and possible solutions
- Additional information
- Acronyms
- Blinking lights and boot error codes
- Processor not executing code
- BIOS recovery code unable to find valid BIOS recovery image
- Memory module error
- Graphics Controller Error (No Controller)
- Failure - System Board Error
- Intel Trusted Execution Technology (TXT) Error
- Sure Start unable to find valid BIOS Boot Block image
- Sure Start has identified a problem (Manual Recovery Policy Set)
- POST error messages and user actions
- Routine maintenance for performance improvement
- Common blue screen error messages
- Use Windows Debugging Tool
- Display issue: pixel anomalies
- Cable management
- Connector types
- Computer Setup (BIOS), TPM, and HP Sure Start
- Using HP PC Hardware Diagnostics
- Backing up, restoring, and recovering
- Specifications
- Power cord set requirements
- Statement of memory volatility
- Recycling
- Index
NOTE: The lid close switch is a Hall-eect sensor located in the top cover. When the display is closed, the
sensor acts like a switch is closed. A notebook can force a video output to an external monitor, or go to
hibernation or standby mode through power management. If the display screen does not light up when the
display is open, the lid close switch (Hall-eect sensor) could be faulty.
Dead pixel
Display panel may show one or more pixels that are not properly lit when displaying a single color over the
screen area. Use HP PC Hardware Diagnostics (UEFI) tool to determine those defective pixels. There is no
solution for dead pixels. Refer to Display issue: pixel anomalies on page 146 for the HP dead pixel policy.
No video (internal)
Table
8-29 Issues, possible causes, and xes
Items Procedures
Symptoms
No internal video with certain
programs (i.e., video-intensive games)
Possible causes
Display resolution, brightness, faulty lid switch, running a program requiring a higher
resolution than the display screen can support.
Faulty lid switch may put the system into Sleep or Hibernation mode.
Troubleshooting steps
Use an external monitor with higher resolution.
Test with external monitor using HDMI or HP port. Press the power button and close the
computer lid to force video output to external video. If there is still no video, contact support.
References See section No video (with power) on page 101 for display information.
Common issues and possible solutions 115