What is what to do when nintendo switch won't turn on?

Here's some troubleshooting information for a Nintendo Switch that won't turn on:

Initial Checks:

Power Button: Ensure you're holding the power button down for a few seconds (12 seconds, specifically) to force a hard reset. This is the first and easiest step.
Charging: Plug the Switch directly into the official Nintendo AC adapter and let it charge for at least 30 minutes, even if the screen remains black. Don't use third-party chargers initially, as they can sometimes cause issues. See if the charging indicator appears after a while. Also make sure the wall socket is working.
Check the AC Adapter: Make sure the AC adapter is working properly. Test it with another device if possible or try a known working charger.

Troubleshooting Steps:

Hard Reset: Try the 12-second hard reset again while the Switch is plugged into the AC adapter. Sometimes, this can kick-start the system.
Leave it Charging: If the battery is completely drained, it might take a significant amount of time for the Switch to respond. Leave it charging overnight and try turning it on again in the morning.
Check the Charging Port: Inspect the charging port on the Switch for any damage or debris. Use a flashlight to get a good look. If you see anything, carefully try to remove it with a non-metallic tool.

Advanced Troubleshooting (If the Above Fails):

Dock Issues: If you primarily use the dock, try turning on the Switch without the dock. The dock itself could be faulty.
SD Card Issues: Remove the SD card. A corrupted SD card can sometimes prevent the Switch from booting. Try turning it on without the SD card inserted.

If Nothing Works:

Contact Nintendo Support: If none of these steps work, it's likely a hardware issue, and you'll need to contact Nintendo support for repair or replacement options.

Links in Markdown Format:

contact Nintendo support