Wow that was a fast response!
Ok, I would start with trying software, as that is the easiest fix... If it is a possibility, I would even try with a fresh install, but I understand if that cannot happen. Make sure the latest drivers are installed and you have the latest MS updates. If the issue persists, check for a BIOS update and then contact the manufacturer (hopefully still under warranty???). See if there are any known issues and see what it would cost to have repaired.
If you know how to get into it, I would verify that all the connections internally are connected properly, but if you have never been in a laptop, I wouldn't recommend it.
Bug