Switch controller: Player lights flashing
The controller is connecting to the console, or its battery is low. Nintendo gives both meanings for the same flashing and no separate pattern for each.
Applies to: Joy-Con and Nintendo Switch Pro Controller. What you see: colour not named by the maker, flashing or blinking. Where: a controller.
What to do
Nintendo Australia Support gives no step for this light; the meaning above is all it says.
Source
Nintendo’s own support page, read on the date shown.
- Nintendo Australia Support: When do the LEDs on my controller light up? — Joy-Con and Nintendo Switch Pro Controller. www.nintendo.com Checked 2026-09-29.