The Laptop is a HP HDX X18T-1200 CTO PREMIUM NOTEBOOK PC model # NK146AV, in the HP parts store they have 2 motherboards that work in this laptop. I have the one that is made for 32 bit with a 512 mb videocard, the one that I want to install is for 64 bit with a 1 g videocard. I am wondering how I can switch bios in the harddrive so it works with the 64 bit motherboard. I tried to install it but when I tried to start it all it did was the CAP lock lights would blink twice and shutdown and start back up, each time it the monitor was black and didn't show anything. What to do?