HP probook 4540s When Ipress on the power button, the power button makes a series of short and long light on/offs and will not

[Ardian_2]

HP probook 4540s When Ipress on the power button, the power button makes a series of short and long light on/offs and will not start up.

 

[penguintech]

you need to actually count the lights, they are a code indicating what the issue is.
https/hpipg.wordpress.com/2013/09/24/blank-screen-led-error-codes/