Hi! So to add further detail, the problem is that RAM was upgraded on my acer laptop a few months ago because it was updated to windows 10. After that, when i plug in the ac adapter, the laptop doesn’t even acknowledge that there is a power source… This doesn’t happen always but every once in a while. Plus, I have to disconnect charger from the power source and retry after like 15 minutes to have some hope of laptop being charged. Is it a charger problem or power jack? can it have to do with RAM being upgraded? I have no idea why this is happening and need help!!