I bought 4 of these computers.  When I got them set up one wouldn't boot up and two had one video output each not working.  I sent an email to the company through Amazon.  They replied within 24 ours and told me to call them.  Turns out I had a bad monitor cord and a bad adapter on one of the other monitor cords.  So both those were my fault.  The reason the one computer wouldn't boot up is that the outside power button wasn't lined up with the inside power button.  A little nudge with a screwdriver fixed that one.  So everything is working now as advertised.  Thanks tech support.