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

Routine maintenance for performance improvement
The following table presents a summary of the suggested times for performing the routine maintenance
tasks described in this document.
Table 8-58 Routine maintenance tasks to improve performance
Tasks Weekly Monthly Occasionally
Perform a system tune up. X
Run Windows Update. X
Scan for and remove viruses. X
Scan for and remove spyware and adware. X
Empty the Recycle Bin. X
Delete temporary Internet les. X
Back up user les. X
Create a restore point. X
Defragment the hard drive. X
Run Scan Disk. X
Clean the exterior of the computer. X
Close programs that are not being used. X
Prevent programs from loading at startup. X
Common blue screen error messages
Error message list
The following image shows an example of one possible “https://msdn.microsoft.com/en-us/library/windows/
hardware/hh994433(v=vs.85).aspx” from Microsoft:
The hexadecimal number following the word "STOP" is called the bug check code or Stop code. This is the
most important item on the screen.
Bug check symbolic names
Each bug check code also has an associated symbolic name. In the example, the screen shows
https://msdn.microsoft.com/en-us/library/windows/hardware/559209(v=vs.85).aspx (MISMATCHED_HAL).
140 Chapter 8 Troubleshooting guide