Arduino turns off when ground pin plugged in

So I'm using an Arduino Uno WiFi Rev 2 with some sensors for a greenhouse project. I've used the circuit before and i think it's a working circuit (all ground bits go to ground, all voltage bits connect to 5V pin etc), and ive double and triple checked.

I've tried powering the arduino using battery and via my laptop. Whenever the circuit is fully plugged in (5V, A0, A2, D11 and Ground) the arduino turns itself off, even while connected to a power source. However, when i pull the ground pin out, the arduino turns on, and performs the example blink code (last code i put onto it).

I can't find anything online and I'm so so confused.

Any help would be appreciated.

What voltage remains on the 5V pin when the Arduino turns off?

Circuit diagram of your wiring needed.

Don’t power the USB and the 5v pin at the same time

Whenever the circuit is fully plugged in (5V, A0, A2, D11 and Ground) the arduino turns itself off,

You should never ever wire up a circuit with the power connected up. That is the best way to damage components.

Wire up all the circuit and then apply the power.

Quite clearly you are wiring it up wrong and have a short circuit.

Hi,

Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?

Thanks.. Tom... :)