Hardware issue Macbook Pro

Hello,

I need advice for my macbook pro that has an intermittent fault. Sometimes it will just freeze, and a grey screen will drop down asking me to reboot the computer (Kernel Panic).

As I do reboot the computer it starts up until the apple logo on grey backgrounds and kernel panic again. I am asked to reboot again. There I reboot a second time and the computer will refuse to boot (black screen) with an S.O.S signal (3 long 3 short 3 long beeps) or a Bad memory bank signal (3 short beep).

When this happens I have to open the computer remove and replace the memory in their slots and the computer starts again as if nothing happened.

I bought new ram and new hard drive hoping it would resolve the problem, but it's still happening. When I went to an apple certified reseller to assess the problem they did a full hardware check and could not find anything wrong. I also tested myself extensive hardware tests (stress test of the CPU for more than 12 hours, stress test of ram for more than 12 hours) and everything seems fine.

Though I have to admit that during a conference the bag in which I put my laptop broke, leaving the macbook pro falling of about a meter and denting the left bottom corner (the one towards the battery light indicator).

I really don't know what to do or test anymore. Has anyone any idea of what I could try / do ? I don't feel safe working on my computer as It can crash anytime. I do have apple care and it's still under apple care warranty.

Any comments or help will be greatly appreciated.
Best Regards,
Fdevv

 

Yes I reinstalled the OS on the new hard drive. I reinstalled also all my applications from scratch.

What should I tell them at the genius bar ? What do you think could be the problem ?