Hello I installed an Asus B85M-g and before i could boot up the computer for the first time i needed to replace the bios battery, so i did so while the computer was unplugged and plugged everything back in a booted the computer up. now when i try to turn the computer on it brings me to a screen from asus saying to press del or F2 to enter bios settings i have tried all the usb port and 3 different keyboards and i cannot enter bios settings please help me