Just received the unit. Doesn't power up. Took cover off and PSU and CPU fans spin for a sec and then try again but wont power up. Probably a crap PSU. Contacted Amazon and they said I have to go through Lenovo for help (if I had know that I would not have purchased unit). Amazon support gave me a link to Lenovo but it wasn't for service. Tried to go through the Lenovo website and I can't submit a support ticket because they cannot locate the serial number of the unit. I know where this is going...round and round. Based on the amount of 1 star reviews I think it would be safe to say that these are not tested before the are packaged.