Sadly it just happened to my laptop as well. 
I was migrating the V3 image to my nvme, when it all of the sudden it just died and got really warm where the “WE 220” thingy is locate. So I just pulled the plug, opened it up and removed the batteries. Looks like it melted the cable for the SYSCTL a tiny bit but no other visible damage.
I’ll see if I can remove diode D5 and hopefully that will fix it.