I did a BIOS update, recommended from support assisten on my Probook 4720s last week.
Since there nothing is running. My display remains black.
I tryed the following:
A BIOS recovery with pressing WIN+B (or all arrow keys) during power up. Doesn't help.
A recovery with a bootable USB stick and binary file on it. Also doesn't help.
Following is the reaction when pressing WIN+B Taste - Power-On:
After 10s the laptop switches of by himself with a click at the speaker.
He powers up again by himself. The power LED witches on und after 2s off for a short time Ulaptop does'nt go off.
LED does ligt up again. After that computer remains on and nothing happens. The displa remains black. No text.
Is there any information wht this light signals mean?
What else can I do?
Im very upset becaus a BIOS update (HP Software) seems to destroy my book. I hope ther's a solution.