HP Mini 210-1020EH PC - Manual (Page 34)

If the computer is unresponsive and you are unable to use the preceding shut down procedures, try the
following emergency procedures in the sequence provided:
● Press ctrl+alt+delete , and then click the Power button.
● Slide and hold the power switch for at least 5 seconds.
● Disconnect the computer from external power and remove the battery.
26 Chapter 3 Power management