Xbox Series X|S won't turn on: power supply vs mainboard checks

Written by the CircuitScope research team in our own words, from the sources listed at the end, and checked by our moderators.

A Series X or Series S that does nothing when you press the power button is usually down to the mains lead, the socket, a tripped internal supply or a failed internal power supply unit; a smaller share are mainboard faults. Work from the outside in: reset and swap the simple things first, then open the console, check or swap the internal PSU, and only then look at the board.

Difficulty: Moderate · Time: about 1.5 hours

Also applies to: Microsoft Xbox Series S

Symptoms

• No response at all when the power button or controller Xbox button is pressed
• No fan spin, no start-up sound, no front light
• Console switched off by itself during use and now won't come back on
• Front light comes on but the console never shows anything on screen