How to determine if the board is good or not, ( without the USB-UART or the FTDI programmer )

If I connect a 5v external wall adapter pin to 5v of the ESP32-CAM and GND pin of the adapter to the GND of the ESP32-CAM.. should I expect the onboard LED to light up.

Very simple test to see first if the board is good or not ?

How about stepping 5v to 3.3v and connecting it to 3.3v of the ESP32-CAM ( the upper most first pin)

Not sure if this is the right place to ask this question .. Please delete if irrelevant.