Bought this beat-up switch. Owner said it boots when plugged in, but not for me. When charger is in, red battery is flashing.
However when I opened the hood there was some wire soldered that shouldn’t be there originally. Grey one by the USB-C.
Any idea what it does and why was that done? Or how should I proceed with fixing this?
I don’t seem to be able to add pictures, however it’s on imgur ending with a/cSrU3QH.