Ok, so I got a good deal on a second hand Packard Bell (don't laugh!), that came with Vista. There was something wrong with the harddrive so I thought, hmm.. why not just format the drive and install Windows 7 over it? So now comes the good part: It did work whilst having vista on it, almost, there was an error when the previous owner tried to do a "rescue" on the disk. And the bad part..: The BIOS was locked, and the owner had forgotten the password. I have two other Packard Bell's, where one had that aswell once, just did the same thing - removed CMOS battery and let it sit for a while, put it back in and voilá: Nothing happens. (Well almost nothing, it powers up but that's just about it). So my first thought is.. The memory.. I might have placed a memory module incorrectly. Nope. Wasn't that. Something is shorting the motherboard (ASUS). Nope. Try another AC/DC Adapter? Nope. Connect it to an external screen. Nope. Still nothing. Hear a noise from DVD? Yepp. Harddrive? Nope. Speakers making any startup noise? Nope.. I have run out of idéas. Totally. I have opened the computer and put it back together more than five times now. Tested the memory, the harddrive on other system.. Nada. Any clues? I tried to google, noticed that a guy who actually changed the motherboard experienced the same issue. The model is AJAX C3 (C3 series?). If it's wasted, then I'll salvage the parts and use it on my other PB.