I use method on internet to unlock bios functions. intrusion is pressing fn and esc key down til see usb light flash... But I can't see the light flash, i reboot laptop without that usb.. but only battery, charge led is on and the fan spin.there black screen on my laptop..what should I do..i try to hold power botton for 30 second but it didn't works....every method I found didn't work..can i fix it by my self?