Went to turn the computer on but nothing happens. So I disassembled again to see if I missed something. This time, before I reassembled eveything, I basically connected all the cables, inserted the hard drive, connected the keyboard and attached the powercord. Turned the power in and it worked. But the keyboard didn't work other than the power button. So I connected a usb mouse. I have no Bluetooth connection. Went ahead and powered off and finished putting it back together again. But the power button and nothing . What happened???