Check everything carefully yourself! If you don't even know what to check, this is not for you.Mine started with a BIOS error "CPU fan not detected" but otherwise starts fine. I found out that indeed the CPU fan cable connector was partially torn from the board (the soldering was damaged) and the fan was not working at all. This can be dangerous for people who don't understand or ignore this.The type of damage cannot be due to shipping so must be shipped to me as a "refurbished, fully functional, and in excellent condition".