My monitor gets no signal at all (that doesn't mean the monitor says no signal, it just keeps itself in stand-by mode). My first guess was a broken AGP slot, but PCI videocards give equal results. I have an ASUS P4B533 mobo. All hardware seems fine, pc stripped down to mobo, agp videocard, ram, psu, fans. HDD and fans start. Tried to reset the CMOS. After doing that, and trying to boot a few times, BIOS screen popped up asking me the processor speed. I turn the thing off, plug in a keyboard hoping for another BIOS screen, but I don't get it. I get my USB keyboard ready (plug and play right) and after trying another 100 times to boot up I get another post, then BIOS screen. Asks me for processor speed again, I plug in the USB keyboard and the screen becomes distorted (not sure if distorted is the word, anyway, as if an corrupt image file is displayed, there's wrong coloured bars all over the place). When I got those post/bios screens, I didn't change the configuration from what I tried before. It seemed completely random to me. Any ideas on how to fix this? Thanks in advance and sorry for my poor English.