I have the same issue on a different laptop, what I found out is that a piece of the charging port on the laptop side has broken off which caused the contacts to not fully connect.
have you checked reseating removable parts? like ram hdd pcie slot graphic card , i have had a similar problem but with the hdd i have switched to a ssd and the problem was fixed for me.
my soundbot was same design but different revision? (inside plastic was different, different compartment and different battery), still i had no problems following these same instructions
