I had tried those methods previously before...
I gave it another go, but same result.
Boot logo comes up, then F8.
Before I can even scroll down to lowest resolution, screen goes blank.
Attempt 2 try, selected lowest resolution then goes blank.
I can heard Windows have booted up (Windows startup sound) but I'm still stuck with a blank screen. Press menu will still give me no signal. After several attempts, I got to menu screen and hit factory reset. Same result, a blank screen.
Tested few other monitors with this issue, no luck for all of them.