Buyers beware. I bought this machine April 2018 and eight months later, issue! It was lightly used since it's a home machine; mostly educational programs. Last time it was turned on, it wouldn't boot and got an error code.  I checked RAM, USB, capacitors, and everything else.  Per the error code, looks like my power supply is bad.  I opened the power supply and I confirmed the error to be correct!  It's not worth my time to solder new capacitors, nor getting a new power supply.