LEDs near Caps Lock and Number Lock keys blink for hp compaq

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.

 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

 Knowing the number of blinks is helpful when you contact an HP support agent for technical help. and Computer shop.