I have a home-built PC based on an ASUS motherboard and ATI 5670 video card. Everything was running fine for months, but a few days ago I started running into an issue where my BIOS screen would load but be complete corrupted (white screen with red horizontal lines going across), and then Windows 7 boots fine. Also, when I wake the pc up from sleep mode, the computer will occasionally wake up but the monitor will not turn on, requiring a reboot. Outside of these two issues, I have no problems within Windows 7 doing everyday tasks. Any idea where to start troubleshooting?