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
I/O devices
NOTE:
● Make sure external devices are supported and compliant (i.e., USB Type C, Thunderbolt 3, PCI Express,
etc).
● If you have problems with external devices not provided by HP, contact device manufacturers for
compatibility and latest drivers prior to troubleshooting (i.e., USB devices, Thunderbolt devices, PCI
Express Card reader, VGA/Display/HDMI monitors, Speakers, etc).
● Be sure I/O devices are properly inserted into the I/O ports, and then be sure the I/O devices are
recognized by Windows Device Manager.
Keyboard
Table 8-35 Issues, possible causes, and xes
Items Procedures
Symptoms
Keystrokes not recognized
Characters not matched
Possible causes
Dust trapped under keycap, loose keycap, loose keyboard connection, defective keyboard.
Troubleshooting steps
1. Inspect the keyboard for any signs of dust, liquid, or debris trapped under sticky keys
that might prevent keystroke recognition.
2. Check for incomplete connection between keyboard and system board by verifying that
caps lock or num lock light turns on when key is pressed.
3. Verify whether the keyboard is recognized in Windows Device Manager and verify
whether the keyboard driver is installed properly.
4. Test with a working external keyboard (i.e., USB keyboard).
Also test in Windows for special keys (Caps Lock, Shift, Ctrl, Fn, Windows, Alt) if
necessary.
5. Test with HP PC Hardware Diagnostics (UEFI) to isolate a hardware issue from a
software issue.
6. Verify that BIOS is up to date. If so, resetting BIOS to default may help.
7. Test with veried working operating system or restore operating system to be sure that
the issue is not caused by dierent language settings, sticky keys feature, etc.
8. Verify that keyboard ex cables are fully inserted and in good condition.
The sections below are intended for authorized service providers/technicians.
1. Verify if keyboard ex cable is in good condition (no delamination or torn cable end, no
missing or cracked tracks, pads).
2. Verify keyboard ex cable ends are fully inserted and aligned with connectors on
system board, and those connector tabs are properly closed. Reseat cables.
3. Replace new internal keyboard and retest.
Tips and tricks A key only works when pressed with force. Inspect and remove debris trapped under keycap.
Common issues and possible solutions 119