01-11-2020 01:00 PM
I have a Probook 450 G4. Today my battery went down and when I put it on charger it refused to boot up.
I get 2 long 2 short beeps, caps lock and num lock are blinking and the screen doesn't start. I checked this thread:
Release the Power button but continue pressing the Windows and B keys. You might hear a series of beeps - I hear the usual beeps after which the fans start running on max RPM and nothing else happens afterwards.