I purchased my Surface Book in 2016 and it has been working perfectly until the past few weeks. The tablet battery (1) says it's "Not Present" and isn't charging and the keyboard battery is charged completely. Because of this, it won't allow me to detach the tablet, which isn't my biggest concern. I only get 3-4 hours off the keyboard battery which is difficult as a college student.
I have tried the UEFI boot restart like mentioned in previous articles, restarting the laptop normally, flipping the charger around in the port and wiping it down, running the diagnostic tool, and the power trouble shoot in settings.
Unfortunately my warranty has expired since then, so please advise me in anyway possible!