My Razer Blade 14 (2015) sat unused and plugged into the charger for 7-8 months. (Not ideal, I know.)



I went to use it today and it won't power on at all when unplugged. If I plug it into the power adapter, it powers on only long enough to briefly display the BIOS boot screen, then turns off instantly.



Is this likely a bad power adapter? (The power adapter does light green.)



Or could a battery failure cause it to act this way even when on power?