My Macbook Pro with Remakes funny noise when connected to power supply cable and no other response. The best description of the sound I can give is the buz the computer makes on startup. Sound goes on and off while connected
I am new to the Macbook community. I own this Macbook since 10/2012.
My Macbook Pro 15 with Retina Display suddenly totally stopped responding. No display, no activity on keyboard. When I connect power supply cable, the Mac makes a noise as if it is starting up, but this lasts a second and this sound comes and goes the whole time the power cable is connected.
Any advice?
Thanks!
Reset the SMC and the NVRAM:
http://support.apple.com/en-us/HT201295
http://support.apple.com/en-us/HT204063
The try a safe boot:
http://support.apple.com/en-us/HT201262
Any change?
Ciao.
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