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 · Mar 7, 2017

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 · Mar 7, 2017

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/