Fan Noise Problem and SMC Restart (?)


hey guys, have 15" macbook pro retina. today accidentally pressed while turning macbook on, , somehow login wallpaper changed apple wallpaper default (the mountain orange sky).

after while, realised fan sounds loud , macbook gets hot without me doing (i have safari , mail on run).

i've tried smc restart (the 1 shift + ctrl + option + power button), , didn't work out.
i've tried put macbook sleep, restart it, shut down, didn't work out.
tried reset pram (don't know why this, want try everything), , still didn't work out.

guys me please? need use macbook works, guys.
 

  1. is macbook operating in safe mode if leave sit?
  2. does erratic behaviour occur if macbook idling?
 


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