Im not even sure taking out the wheels is necessary. They dont appear to be attached to the purple plate.
Are you saying replacing the charger fixed the issue for you? Or are you saying temporarily using a better charger to get the battery above 5% and then using any charger after that to finish the job fixed the issue?
On further inspection it looks to be some sort of thick thermal adhesive, very thick. The gap between the cpu and the heatsink is quite substantial, and cant be made smaller cause of how tall the screw wells are. Replacing with thermal paste seems risky, I don't know how youd get enough without it seeping out over time.
Unless this is actually a thermal pad? Is it possible to re-use?
What did you use for thermal paste replacement? Does it matter what kind?