My Dell Inspiron 1720 wasn't charging anymore so I replaced the motherboard. But when I start Windows Vista, I get a blue screen with the stop: 0x0000007B error. I tried to change in the BIOS from AHCI to ATA, this allowed the laptop to start Windows, but after Windows has started, it is rebooting for no reason. I could start it in Safe Mode successfully. What should I do? I'm happy that my laptop is charging now but I'm blocked with this blue screen.