Macook cuts out when you pick it up underneath top left side.

Ive had a few problems with the screen disconnecting and I've had a cable replaced twice now on this macbook pro (2012).

However I've noticed when i pick it up from underneath at the top left side the screen freezes and bleeps. When i try to turn it back on the screen won't start up and continuously bleeps.

I leave it for a few hours or a few days and when i try to start up it works fine.

it has been running slow recently. Im not technical at all but is it something to do with the hard drive and the cable?