Have you tried updating the BIOS? At work BIOS updates will often fix lots of little things you probably wouldn't think of, even if it's not listed in the update notes. We often get advisories from manufacturers advising to update the BIOS to fix a particular issue, but on the update page there's no mention of that issue. I've seen updates that address things from fan noise, failure to load OS, screen brightness issues, charging issues, boosting issues, etc. Worth a try. Just make sure you're plugged in and have a decent battery buffer (>20%).