I have a problem with my Macbook Pro.
Everything was working fine up until yesterday; I can't start it anymore and it "beeps" once every 5 seconds.
According to the support, this indicates that "no RAM is installed", which is not true.
So I tried to change RAM but I have the same problem. I put the suspect RAM into another computer, and it worked fine.
I Googled but I didn't find a solutions. The Macbook didn't take any knocks, I didn't try to change any RAM (before this problem), there is no reason for this error.
Does anyone have an idea ?
(Macbook Pro 13-inches mid-2012)