I have a re-occurring problem with my laptop. Sometimes, when I transport it places (like in checked luggage) it will not boot. Not even a post. I have come to discover that the cable under the central control cover becomes loose. It's a terrible connector that holds the cable.
The connection is very finicky and hard to get in there just right and stay. I'm currently trying to super glue the connector and tape so I don't have to deal with this issue anymore.