If nothing, that's a bad sign. I usually have to remove the HDD to help the owner salvage files they didn't backup.
But do try the usual Generic Reset noted in the welcome sticky in the CNET Laptop Troubleshooting Forum first.
My Toshiba Laptop L300D shut down installing updates on Windows 7. When I tried to restart it the screen is blank, I can hear the hard drive running, I have tried to start in Safe Mode, but nothing comes on screen. Help.