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
Display
Display anomalies
The display panel is a eld replaceable unit (FRU) and must be replaced by only authorized technicians.
However, HP highly recommends that users and technicians observe specic symptom vs. generic symptoms
and utilize the HP PC Hardware Diagnostics (UEFI) tool before any replacement.
Symptom
Common display issues with symptoms:
● Blank/black video
● Incorrect/missing color/distorted image
● Flickering image
● Vertical lines (due to LDVS, decreased signal integrity, and data loss)
● Dead pixel (due to display liquid, internal transistor, etc.)
● Horizontal lines (due to video memory)
● Distorted when hot (due to thermal issue)
● Cracked screen/image (physical damage)
● Light leakage/bleeding
Contact support for assistance.
● Humming noise (due to frequency settings)
Contact support for assistance.
Table
8-28 Display anomaly illustrations
Display anomalies
Cracked screen
Cracked image
Blurred image
Dead pixel
Vertical lines
Horizontal lines
Common issues and possible solutions 113