Chosen Solution
I opened the system up, disconnected the battery and put in a charge cable. It hadn’t turned on until then but it did show the orange light for a couple of seconds. I checked with a multimeter, and current seems to be consistent but voltage is all over the place. Is it likely to be a charge port issue or possibly the battery?
@playxenoblade we don’t know where you measured for any voltages nor do we know what readings you got. At this time you want to start off with a new battery. If nothing else it will give you a known-well starting point for further troubleshooting. Let us know what you find out after you replace the battery with a NEW one