Hi, thanks for the great support. the device is HP 840 G1 (detail is in my signature).
I am trying to get into ‘START UEFI SHELL 64’, but always fail.
My steps:
1. Power on
2. Press ‘right’ key to select, ‘enter’ key to enter ‘START UEFI SHELL 64’
Then, device stops/sticks, and screen always...