Nintendo Switch revised model will not turn on

The checks in more detail

The iFixit repair guide for a Switch that will not turn on lists the same steps and adds checking the cable, the outlet and the dock. If it works on the original adapter plugged straight in, but not in the dock, the dock or its cable is at fault, and the same the other way round. Inspect the charging port on the bottom of the console for bent pins, lint or damage, and clean it gently with a dry wooden toothpick, not metal.

A third-party dock, a cheap adapter or a damaged cable are common causes of charging failure and sometimes damage the console, so use Nintendo's own or certified ones. If the console shows the Nintendo logo and then goes black, it may be a software problem; hold the volume up and power buttons to enter maintenance mode, where you can choose to start in normal mode, and avoid initialising the console as that erases data. Try a different outlet and cable. If the console is hot, let it cool first. A swollen battery, a console that was wet or one that stays dead on a known-good adapter needs repair, and Nintendo's repair service handles it.

Do not open the case yourself while it is under warranty, and do not charge a swollen console. Think about when the failure began. A console that died right after being docked with a non-original adapter suggests the adapter, one that died after a fall suggests damage, and one that died after being left in a hot car suggests heat damage to the battery. Tell Nintendo this history when you contact them, as it affects the repair. Keep the console and the dock plugged into a surge protector for storms.