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
Table 8-33 Issues, possible causes, and xes (continued)
Items Procedures
If the external monitor also shows incorrect color, it is graphics card issue. Test with a
veried working graphics card.
Verify display cable and cable connection–Display disassembly is required.
Be sure that external display cables are not pinched or damaged.
Be sure that external display cables have good connection at both ends (system board and
display panel).
● If moving cables aects the image, it is display cable. Test with a conrmed working
cable.
● If moving cables does not aect the image, is display issue. Test with a conrmed
working display
Touch screen
Table 8-34 Issues, possible causes, and xes
Items Procedures
Symptoms
Unresponsive
Inaccurate
Possible causes
Dirt and smudge, driver, touch display conguration, power management.
Troubleshooting steps
Quick check
Turn o the computer, spray glass cleaner onto a soft, damp cloth, and gently
wipe the screen to remove dirt and smudge.
NOTE: Do not spray cleaner directly onto the screen.
Congure the touch display in Control Panel >
Tablet PC Settings
1. Restart the computer.
2. Verify touch screen and graphics drivers.
3. Congure the touch display to identify the screen as a touch screen as shown
in the image at left.
4. Calibrate the screen and reset if touch functionality is still not working
correctly.
5. Perform diagnostic test in HP Hardware Diagnostics under Component Tests
> Touch Screen.
If the diagnostics tests pass but the touch screen still does not respond,
continue following the steps.
6. Adjust the power management settings for your touch screen.
If the touch screen stops working after waking from sleep, adjust the power
management settings so that the touch screen device stays active while the
computer is in Sleep mode.
7. Perform Microsoft System Restore and restore to a time when the system
was working.
8. Perform HP System Recovery if none of the above actions resolves the issue.
References https://support.hp.com/us-en/document/c03488148
118 Chapter 8 Troubleshooting guide