This is a U405D-S2874. I had to replace the lcd cable. Upon reassembly, I got an icon in the task bar that shows: "Battery Not Detected" when I hover the mouse over it. So i pulled the battery out and found that it rattled (something loose inside), so I ordered a new battery, but lo and behold, even with the new battery I still get the same "Battery Not Detected" icon.
So obviously something happened during the disassembly/reassembly. Any ideas?
Just wanted to mention that I'm a repair tech and I've torn down dozens of these, never had this happen before.