Make sure that you are connecting a known good 140W USB C charger when you attempt to power it on. Anything less than 140W may be unable to power on the computer or charge the battery from a fully discharged state. If you are using the correct wattage charger, the it may be possible you have a larger hardware issue with your computer, possibly a damaged logic board, in which case you'll need to do more advanced hardware troubleshooting. Good luck!