HP Pavilion dv5000 Notebook PC Series Quick Start Manual page 7

LEDs near Caps Lock and Number Lock keys blink
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
LEDs blink 1 time
LEDs blink 2 times
LEDs blink 3 times
LEDs blink 4 times
LEDs blink 5 times
LEDs blink 6 times
CPU not functional
The computer processor (Blink code 1) has stopped functioning properly. Contact HP for
assistance.
BIOS corruption failure
If a BIOS corruption error occurs (Blink code 2), you may not even notice the blink codes,
Component Tested
CPU
BIOS
Memory
Graphics
System board
BIOS
Error Condition
CPU not functional
BIOS corruption failure
Module error not functional
Graphics controller not
functional
General system board failure
BIOS authentication failure