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.

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 Failure

Some times LEDs blink 1 time mind GPU not funcional and need reballing

http://h10010.www1.hp.com/ewfrf/wc/docu ... ct=1132551

cq 40 404ax also changed the graphic card work. when it one blink

Thanks for the information

Also if on then restart again then blinking one times it means Bios corrupt.