I have been calling Dell Premium Tech Support multiple times over the past two months. They have been apologizing over and over, running tests and even sending a technician to my house. All of them acknowledged the issue and are still unable to solve it. I sent the unit to Tech Support twice and they sent it back without fixing the issue. I believe that this service keeps stalling and makes you waste your time hoping to make you desist and keep a defective unit. I paid for this "premium" service and they don´t fulfil their obligations. 

I cannot use the laptop properly because every time it goes to "Sleep Mode" or the screen goes black I cannot "Wake it up" again. I have to push the power button for five seconds and turn it off and on again. Therefore, I loose the documents I was working on.