I have 820-3209 with a keyboard problem. Before that i had a trackpad issue with it and tested the trackpad and found out that it was shorter to ground and because of that it did not start. After replacing the trackpad with a new one it started to work but now the fan spins full speed and the keyboard itself pushes buttons. Some of them work just fine like volume buttons and other keyboards. What could be the issue here, its weird in first place that the trackpad is shorted to ground.