Anybody come across this before?!

Hi
I've had my MPB now for a couple of years now. But occasionally it will freeze with blocks of green lines across the screen (see pic).
Also there is a series of 3 beeps. (which i read somewhere was a RAM issue).
It has been in for a Logic board repair a couple of times and nothing was found on the apple store diagnostic.  I also heard it could be a logic board issue.
My Mac has a 8g 3rd party Ram installed, could it be this?
Any light on this situation would be greatly appreciated.
Cheers
Ed

The three beeps does indeed represent a RAM problem.  Install the original RAM and see if that will stop the beeping.  Macs are very selective when it come to RAM.  Even with the exact specifications, some brands of RAM will not work properly in a Mac.
In regards to the display, it may be a GPU or display issue.  If you have a monitor, connect it to your MBP.  If the monitor display is identical to the MBP, then it is a GPU problem.  If the display is 'normal'. then the MBP display or display connection is faulty.
An appointment at an Apple store genius bar should be able to determine the exact cause.
Ciao.

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