Just received today, plugged into wall, hooked up HDMI to TV, turned on.  Blue led light came on then went off.  Tried different plugs, always same, led blue light came on then went off, would not boot up, waited like 10 minutes for it to boot up NOTHING!  Also no Windows Activation card was enclosed in box as shown on MINIS FORUM site. Don't guess I would have needed it since it wouldn't even boot up.  What a disappointment.  RETURNED SAME DAY AS RECEIVED.  Going on hunt again for ONE THAT WORKS!!!!  My photo shows a windows activation card that should have been in box. IT WASN'T!!!!!UPDATE:  2-28-20:  I received another mini pc from the seller yesterday free of charge.  I plugged it in and BINGO it worked like a charm.  I was so surprised, I was up and running in minutes.  Windows came on, and no activation key was needed plus no watermark on screen.  I also attached my printer and it worked perfectly printing out several pages of tests.  The little PC was actually very fast and connected to the internet very quickly.  The seller sent several emails to make certain I had a PC that actually worked.  I certainly appreciate the promptness and courtesy shown by the seller.  I don't think anyone would go wrong in purchasing from this seller as they are just fantastic.  I highly recommend them!  Thank you for a wonderful product.  Up dated to 5 stars and photo of new little PC.