My HP probook is rarely charging, only when holding the charger in a specific position. When it's not charging, and I hold the case I feel a strong electric current going through my hand, but this never happens with the AC unplugged. The OS doesn't give any errors, it just shows "Connected to AC, not charging" but the battery % will keep draining until 0%, where the laptop just blacks out. It's not the charger because I ordered a replacement and it's showing the same behaviour. Is this fixable or should I just get a new one (my warranty expired couple years ago).