When I first got it I could hear something clanking around inside. I had plans to put an NVMe drive in it so no big deal, I'll find out what's rattling around then. The next day when I had time I opened it and found an extra PCI shield in there. I saw no damage but dang this could have shorted something out damaged a surface mount chip or cap during shipment. Not too sure who refurbed this unit but details people.Installed the NVMe and it's great, I use it for a couple of services in my small server room so I'm not doing much on it. Works as expected and does the tasks like a champ. I've thought about buying another but decided not to. I think the computer is good just know if it sounds like lose parts are inside you might want to open it up to make sure it's all good.