Just purchased a Razer Blade and everything seems fine except there is a high-pitched buzzing noise that comes from the keyboard whenever I plug the laptop in. It is quite subtle, but it can get irritating if I am in a quiet room. Also, when I change the power plan from balanced to Razer Cortex plan the noise becomes even louder and is very noticeable. This makes me believe that it is a problem with the battery. I just would like to know if this is normal or if I should worry about it.