i just recently built a new computer about a month ago and everything worked perfectly.

but today i figured i would get some files off my old harddrive so i was going to put it in my computer as an extra for now until i got all files put somewhere else

so when i plugged the HDD in and started my pc it got stuck on the BIOS screen that says the keys to press to go wherever and it wont go past that and nothing worked to go to like the boot menue to start-up ect its just stuck there what would cause this

my mobo is a Gigabyte Ultra durable 4 classic ddr3

if that helps

thanks