Received yesterday and thank goodness I opened right away.  Monitor is a wall mounted HP- looks like the kind I have at the hospital I work in that is on the nurses cart and is mounted sideways. Tower is a Dell and has gouges on the side. Turned it on- nothing happened. Rechecked everything again and tried a 2nd time- nothing. Third time it powered on and I got as far as opening "my settings" then the tower started making a horrible grinding noise and now the monitor says "no signal." Power on/off not helping. Checked the website for the certified refurbished vendor based on the card that came in the box and their refund policy for direct sales is absurd- the consumer has to pay for a replacement if their refurbished equipment is dead on arrival. Thankfully I bought through amazon and can hopefully return via their policy.