PW is shorted to GND? If you're lucky it might be a transient short, remove the cells and give your PMS a little IPA scrub to clear any flux-borne solder wispsJust confirmed that I'm getting continuity between PWR and GND Not sure how that happened as I've kept all the contacts away from each other and didn't have any bridging, but that pretty much confirms it's dead and I'll need to replace the battery management circuits