3 Red Lights Flashing - is a general hardware failure
Unplug everything and let it sit for 20 min. Re-connect and try re-starting
If
these steps do not resolve the behavior, turn the console off, remove
the hard drive, and then turn on the console. If the 3x Red LED error
light is no longer displayed, turn the console off, re-attach the hard
drive, and then turn on the console.
Check the lights on the
power supply. When you turn on the console, the power supply light
should illuminate green even if the three lights on the console flash
red.