Continuuous reboots mean that the computer starts up, performs some sort of start up process and then begins rebooting all over again.
In this case, determine how far the boot up goes before the system reboots. Do you get the BIOS screen only or do you get all the way to the operating system’s splash screen and then the system reboots? Or do you get all the way to the desktop of your operating system?
Continuous reboots can be caused by bad drivers or bad configurations in your operating system. If you’re running Windows, you can press F8 during the start up process and choose “Boot from last known working configuration.” You can also try starting in safe mode. Again press F8 during the start up process and then choose “Safe Mode.” Safe Mode loads a basic configuration. In Safe Mode you can also disable automatic restarts in System Properties.
Continuous reboots could also be caused by bad hardware. If you think this is the case, you can try removing or replacing hardware components with known good components. Check all the connections to the components.