Battery Not Recognized, Not Charging - HP ZBook 14u G6 Maintenance And Service Manual

Table 8-11 Issues, possible causes, and fixes (continued)

Battery not recognized, not charging

Table 8-12 Issues, possible causes, and fixes
Items
Symptoms
● No battery status light
● Blinking amber (critically low
battery level)
● No boot without AC adapter
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.
Procedures
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 off: battery not recognized.
2. Battery status light is blinking amber: critically low battery level.
Reset
1. Hard reset (8. Hard reset on page
2. Soft reset (9. Soft reset (Default Settings) on page
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 confirm 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)
HP PC Hardware Diagnostics (UEFI) is a good tool to use to isolate and determine faulty
●
battery, especially for quickly discharging (short life) battery.
91)
92)
(6. HP Hardware Diagnostics and Tools on page
Common issues and possible solutions 101
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