I had the MB, WiFi, and Screen replaced by Dell tech and it still has major problems staying connected and that's after another dell remote connection has numerous changes to the WiFi adapter settings. It still disconnects when move the screen sometimes and always when you close the lid regardless of power and windows settings. But more importantly is the frustrating screen brightness. Why should plugging in my laptop; drop the screen brightness to 30% and make ibt basically unseable untll it's full charged? When I unplug the Dell it goes back to 100% brightness but this is no way to run a laptop forcing screen brightness to the minimum while it's charging which is the normal state when using it and plugging it in at while sitting at a desk. I can't wait 4 to 5 hour for it to fully charge and then return finally to full brightness this is crap they way it's designed. When I unplug the charger the setting is identical to the minimum setting when you press the function key and F4 all the way down to minimal brightnesss. That's nuts. That's wrong and never had a laptop do this!! Crazy.
Totally unacceptable that charging forces the minimal screen brightness. IF thye had to put such a tiny adapter to charge battery that they require minimizing the screen brightness in order to charge it then shame on them that is bad bad bad bad bad engineering!!
Last Dell I will buy. Ever.