Hi, my MacBook Pro (Mid-2010) running OS X 10.11.5 crashes very often. Often, I am unable to turn it on afterwards, the computer giving three beeps and then five seconds of pause. I know those sounds signify a RAM issues, but in various forum threads I see that similar problems might persist also after changing RAM. The description below seems very relevant. https://discussions.apple.com/thread/5680376?searchText=mid-2010 three beeps The logic board was replaced a year ago. Other than that, I have inserted an SSD drive a couple of years ago. Today, the computer displayed the attached error message upon startup. Has anyone got helpful suggestions?