jhonnyboy 1 Junior Poster in Training

Hey guys my laptop goes black right after the bios, it doesn't even show xp loading. I was able to recover everything on the HDD. When i put the new hdd in and tried to install xp, xp says the computer doesn't have any hdd. So i'm thinking this is not a HD problem, but since im fairly new @ repairing laptops i don't know what it can be. The only thing i can think of is the connectors on the motherboard?
Any help would be greatly appreciated. Thanks guys!