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 8-11 Issues, possible causes, and xes (continued)
Solution
the power button and front power lights will blink continuously and the computer will
not turn on. Third-party AC adapters will not work on the computer.
Use the AC adapter that came with the computer for better performance.
Battery not recognized, not charging
Table 8-12 Issues, possible causes, and xes
Items Procedures
Symptoms
● No battery status light
● Blinking amber (critically low
battery level)
● No boot without AC adapter
Possible causes
Defective AC adapter and/or battery.
NOTE: Before proceeding, verify that the computer can boot to BIOS or Windows with a
good AC adapter.
Troubleshooting steps
Visual inspections
1. Inspect battery connectors for any signs of damage.
2. Verify that battery is installed properly in battery bay without gap or obstructions and
latch locks are tight. Reseat battery (for models with removable batteries).
3. Determine whether battery gets hot (batteries heat up when charging, but not too hot
to touch).
Check battery warranty to see whether the battery is new or its warranty is expired. Battery
capacity degrades over time.
Verify front battery status light
1. Battery status light is o: battery not recognized.
2. Battery status light is blinking amber: critically low battery level.
Reset
1. Hard reset (8. Hard reset on page 89)
2. Soft reset (9. Soft reset (Default Settings) on page 90)
Verify AC adapter
1. Determine whether the computer needs the AC adapter to boot and operate.
Sometimes, intermittently bad AC adapter and loose connection between adapter and
computer results in inability to charge battery which causes short run time.
2. Inspect AC adapter to verify that it is functioning.
3. Test with a working AC adapter and conrm whether battery is charging.
4. Be sure that battery is fully charged (AC adapter plugged in at least 2.5 hours).
Diagnostics: HP tools will report results such as passed, calibrate, weak, replace, no battery
and unknown, and suggest corresponding actions.
Use HP Hardware Diagnostics (UEFI) (6. HP Hardware Diagnostics and Tools on page 84)
● HP PC Hardware Diagnostics (UEFI) is a good tool to use to isolate and determine faulty
battery, especially for quickly discharging (short life) battery.
Common issues and possible solutions 99