My laptop says " diagnosing my PC" and its off it is not switching on up to now?

[waukanato]

My laptop is not switching on after it says " diagnosing my PC

 

[helpstar]

Which laptop is it?

Power supply plugged in?

Isn´t it powering on at all now? Any lights on?
Post screen from the manufacturer visible?

let diagnose the laptop over night, the HDD might be scanned for errors, which can take some time