Plugged in external hard drive and now computer wont

[lsorich]

Hello,
i plugged an external hd into a usb port turned on the computer and the power light started blinking and screen went black, I unplugged power and re plugged and restarted but all that happens is the fan turns on, the dvd drive blinks and I get no power to the screen

 

[rolli59]

Try resetting your BIOS as first troubleshooting step.