So I've just made my first transaction as a seller on Ebay. I sold a very nice dell computer that was a couple years old. Brand new the computer was close to $4,000 and since I never used it I let it go and the final bid was a little over $1,500. This computer was in great shape and it still even had some plastic coverings on it from when I bought it, it was barely used and practically new. After the auction end, they buyer paid immediately, being my first time selling I wanted to make sure I did things promptly so I got the computer out and made sure all of my private information was erased and all of the settings were set back to default. I then tested the features (webcam, dongles, speakers, and everything just to double check) I then took the computer in it's case to the UPS store and had the computer packed very nicely and ready to go (It cost me $95 for packing and shipping). Once I shipped the computer I notified the buyer and he replied with a request to call him as he had a few questions about the computer. So I called and we talked about the computer, the features and all it was a very easy and pleasant conversation. From there I waited for it to arrive, it took 6 days to get to him which is normal. 2 days after the computer was delivered and signed for the buyer calls me to say the computer is not working. I asked if there was a problem with shipping, he said no it was packaged very well but it was very cold when he unpackaged it. So I asked him to explain and he said he powered the computer on just fine and he was setting up his speakers (He's a DJ) and wiring his system, he then tried to hook it up to the internet and he said the screen went black on him and he was unable to get it to work since then. He said the computer powers on but the screen won't show a display. I told him he should unplug everything and reset the computer and to be sure there is enough power charged to the battery as this machine is a power hog. He was going to do so and let me know the next day. He calls me back and still no luck, now he wants to return the computer and get a full refund. I am unsure what to do. I know the computer was in perfect working condition when I sent it to him. It was practically new and I double checked the computer before I sent it and everything was in top notch working order. He believes I sent him a dead computer, which is not the case at all. To me, it seem it seems like he has shorted something out or has screwed the computer up in some shape or form while trying to hook all of his DJ gear and speakers to the computer. Now he is trying to send me a non working computer back to me while getting a full refund. My questions for you are; What would you do? If he goes to ebay or paypal saying I sent him a bad computer, how do I defend or prove otherwise? What are your thoughts? I scared that if I refund him the money and he did screw up the computer I will be stuck with a dead computer and out a bunch of money considering what I paid for the computer initially. I've also thought about messaging him on ebay re-stating what he talked about on the phone so I have evidence of him saying he was able to power and boot the system initially. But, he could very easily say that it never powered on, so idk... Anyway, so for the long story but I really do not know what to do here as I feel I am not a fault for the computer not working. Thanks for your time and advice.