Answer:
Henry can replace the laptop system board.
Henry can use the laptop only when it’s connected to the power using the AC adapter.
Explanation:
The question presents a scenario where the laptop is not charging.
As the question specifies, working battery from another laptop is not working as well in his laptop. So most probably, the fault is in his laptop and he would have to get it fixed. In the time being, he can still use his laptop only when its connected to power using the AC adapter.