Make sure you press fn and Home. Most laptops have a dual use home button. And the function key must be pressed at the same time. 2.8 is faster than 2.9. You may have to wait as much as an hour with the restoring screen showing.
If you can bring out the CTM subconsole by pressing “Home” at boot-up, that means the keyboard is working; use “Up” and “Down” arrows to navigate and “Enter” to choose !