Got a Compaq NX9000 and can't seem to do anything with it

I recently got a laptop it turns on well it doesnt boot up ive tried installing windows xp and nothing happens also ive tried wiping the hard drive using various disk erasers and nothing happens also tried using different hard drives but the xp disc ive got and the Dban and other disk erasers ive got only work when I take the hard drive out I really need help im baffled by it nothing seems to work when any hard drive is inserted?????? please help me

Have you looked at the BIOS and checked the boot settings are correct?

Try booting off USB.

Or play with BIOS boot settings.

Yeah ive tried both and still nothing its very weird ive tried different ram aswell but still nothing

Yes ive done that ut still nothing happens its like when a hard drive is inserted the laptop freezes

Yeah ok

I've literally tried everything but nothing works I'm starting to think its just the laptop that's broken beyond repair!!!

So it boots into bios? what happens when you just switch it on, does it post? when you say nothing hapend when you tried to install windows did you get it to boot from disk? into the windows xp install screen? is the charger original to the machine?