Plugged computer into monitor and power, light flashed once and stayed on, computer fan came on. Tried to power system on, no joy. Did some basic troubleshooting, everything seemed in order, just no post. System has built in speaker so if there was an issue during post, it should have indicated that there was an issue but nothing, no beep or beeps. Tried to get a refund but received the product early so will try again to refund tomorrow, on earliest delivery date. IF no joy there, will contact amazon by phone.Edit: Am in contact with the seller and will update as to the results. I give the seller five stars because they were in contact very fast, and tried their best to make sure I had done everything correctly but unfortunately the computer was a no post, no power on. I ended up at a local store to purchase another, not quite as recent model.