When I power up my Raspberry Pi 3, the red LED lights up and stays red until I unplug it. The green LED always stays off no matter what: - I tried 3 different 2A chargers - I tried 2 different SD cards (each formatted by the SD Formatter tool), both with NOOBS and Raspbian images copied on it (and also without any SD card)
Devices I try to plug on the Pi never get powered (and neither does the network)
Any idea on how to diagnose that Pi to figure out how to fix it?