Please tell me you tried booting WITHOUT the usb card reader. If there is a card in it, it may be trying to boot from the card. The exact same thing happens when I start up my desktop with anything plugged into the USB port, but I have it setup that way. Also make sure there was disc in the floppy drive or maybe even a bootable CD in the tray. However, since you already have the hdd out of the machine and in an enclosure, try plugging into a different computer, maybe even a Mac or Linux machine, shocking how many times that's helped me. Different OS's handle things differently. I'd try all of those options WAY before I'd even consider going to a data recovery. Those guys will do exactly as I've told you and if they are successful, they'll chuckle as they plan to charge you $500 or $600 dollars for a hour or so of actual work, if that is what you want to call it.