I recently built a computer, had it all in the case and the power button did not work, but i could still turn the computer on by shorting the power pins. I installed windows 8.1 like this when it was in the faulty case. I then returned this case, waited about a week, then put everything in the new case, which would turn on with the power button. But when i boot it up, i just takes me to the BIOS, with no option to boot from hard drive, which is where i have windows 8.1 installed. Please help me if you can.