Xbox Series S 512GB will not turn on

The checks in more detail

Make sure it is firmly into the console and a working outlet, test the outlet with another device and try a different cable of the same type, since the cord is a common point of failure. Plug it directly into the wall, not a power strip, for the test. Then press the power button on the console, not the controller, and listen for the start-up sound. If nothing happens, remove the cord for a full minute, hold the power button during that minute to drain the charge, plug in and try again, as Microsoft's console hardware help recommends.

If the light flashes or the console starts and shuts down, a heat or fault problem is likely, so make sure the console has clearance, since the Series S draws air in at the bottom and out of the top and needs space on the sides, and clean dust from the vents with a soft brush. A controller that does not wake the console may be the problem, not the console, so try the button. If the console is set to Energy saving, which switches fully off, it takes longer to start and does not wake from the controller; change to Sleep mode in Settings, General, Power mode and startup.

If none of this works and the cord and outlet are good, the internal power supply has failed, and a repair is the answer through Xbox support, which needs the serial number. The Series S is small and sits in tight spots, so a cord pressed against a wall can loosen over time and cut power in the middle of play. Check the cord path at the rear and use a right-angle plug if space is tight. If the console shuts down only during play, suspect heat, and if it shuts down at the same moment each time, note the game, as a software crash can look like a power loss.