Hi all. Im new to this drone flying so please be patient. I recently bought an Emax 280 rtf version and ive never actually flown it yet ( very frustrating) . I followed the instruction manual and nothing worked not even the remote would connect to the drone. When I was calabrating the esc only 3 motors would spin???? Then I flashed the esc and calabrated it again. Same thing only three motors. I then contacted the seller he told me I shouldve set it up using baseflight instead of clean flight which the manual tells u to set it up with. So I did. And the remote works now bit still only three motors. I switched the motors about and its not the motor?? I dont know what to try and the seller said if I flashed the software I lost my warranty.... Any help would be appreciated. Thanks