when tilted on its side I could hear the fan moved and was hitting internal components. PC took a few seconds to show an error message indicating it had to shut down automatically because of a fan related issue. I can only surmise it was not very well put back during refurbishment. I didn't dare to open the case for fear of wasting my investment. Overall not satisfied with it. It was dirty. It came with a mouse that didn't work and all put together it makes me think I am lucky if it breaks down before the 90-day warranty. I would strongly suggest getting different unit from a different seller.