Valid point. There is no such thing as a time delayed short. Unless some solder melted with a short and dripped somewhere bad... But not as likely.

I think you will need to carefully examine your main board for any burn marks, other than near the PSU. Hmm... A low battery indicator while docked??? I know that the power feed while docked is through the loom, but I thought that recent hijacks recognized the dock configuration as AC power. Not that this helps, but it might be something to look towards.