I have an ASROCK M3A785GXH/128M motherboard with a AMD Phenom II X3 CPU and 4 GB's of memory. Bios version is 1.80 AMI. Suddenly for the last week I cannot access "setup". Pressing F2 simply locks up the booting process and I have to restart. It boots into Windows7 and operates normally. It will not boot from my operating system disk even when I press a key. Nothing appears on the screen (so my key presses are guesses and merely stop the boot process). The first message on the screen is the log in screen showing two users.