First time posting here. I searched the forums and haven't found anything similar to this problem I created. I need help diagonisng a huge mistake I made last week. While in the process of hooking up a new mouse, somehow I ended up plugging in the new mouse with the old mouse still hooked up. The computer squealed. I unplugged it right away, and then I took the end of a usb cable that was plugged into the computer, the part that plugs into the camera, and plugged that in to another usb port. Even bigger squeal. Yeah I know. Hadn't had enough coffee yet. To make a long story short, couldn't get the mouse to work so I rebooted. When I boot up, all the computer info comes up and is recognizing the hardware installed. Then I get this message: Keyboard error or no keyboard present. CPU is unworkable or has been changed. Please recheck - CPU SOFT MENU. I get one beep on post. Homemade system. The main Specs are: Processor: Intel Pentium 4 2.40C 800MHz ABIT IS7 i865PE P4ATX Audio/LAN/1394/SATA/RAID/AGP8X 512 MB DDR400 PC3200 (256 x 2) Samsung 40 GB HDD - Award Bios Ok, so the keyboard is not recognized on boot up, so I cannot enter the Bios. Yes, I hooked up a different keyboard to it and no it did NOT work either. Do you need anymore info? Did I hose the MB or is it the CPU? What else can I try to check? Is there any way to test either the motherboard or the cpu? I have never replaced either of these components but I am willing to try if I have to. TIA for any advice you can give me.