I have
MacBook Pro
15-inch, Early 2011
Processor 2 GHz Intel Core i7
Memory 8 GB 1333 MHz DDR3
Once a week it crashed with beep sound ( 3 times ) beep – beep – beep
Then pixel in the display ever time it crashes is as shown in screenshot
The only way to turn off the the laptop is by pressing power button for 8sec.
Best Answer
There is most probably a problem with your RAM. You can run a full test on the RAM with something like
Memtest
booted off a CD. See here for Mac instructions.You may find just one RAM module is corrupt and you just need to replace or remove it. It might also be that the RAM has become unseated, try taking it out and putting it back in again to see if that is the case.