Battery power LED blinks
The Battery power LED indicates the condition of the power supply. When starting the computer, or when the computer is in operation, use the chart to identify the power condition.
| Battery Power LED | Component Tested | Error Condition |
|---|---|---|
| Battery power LED off, and Caps Lock/Num Lock off | Battery or AC Adapter | AC adapter not connected or failure
Battery low charge or failure |
| Battery power LED blinking | Battery | Insufficient charge on the battery |
LEDs near Caps Lock and Number Lock keys blink when starting notebook
The LED lights near the Caps Lock and Num Lock keys will blink if an error is detected during the start up process. The LEDs will blink a number of times in a sequence and then stop. The number of blinks in the sequence indicates what component caused an error when it was being tested during start up.
If the LEDs stop blinking and the computer does not start, you can press the power button again to repeat the tests. Count the number of blinks, and use the chart to identify the error condition.
Knowing the number of blinks is helpful when you contact an HP support agent for technical help.
| Caps Lock/Num Lock LED | Component Tested | Error Condition |
|---|---|---|
| LEDs blink 1 time | CPU | CPU not functional |
| LEDs blink 2 times | BIOS | BIOS corruption failure |
| LEDs blink 3 times | Memory | Module error not functional |
| LEDs blink 4 times | Graphics | Graphics controller not functional |
| LEDs blink 5 times | System board | General system board failure |
| LEDs blink 6 times | BIOS | BIOS authentication failure |
Error code explanations