Pc has black screened

[sarah836f]

Toshiba L455D-s5776 was hacked and now I have a black screen. PC turns on and the fan blows but will not boot up. I have tried to resetting it, f12,f8,taking the battery out for 1min,5mins Everything I could find on Google. Please help,I saved two years to buy pc. Thanks

 

[COLGeek]

What makes you think it was hacked? Have you tried connecting to an external monitor/display to see if anything flickers on the screen?