Persistent Laptop screen problems

[MehMatt]

My screen initially flickered brightly white once a day, then as time went on the flashing happened more and more often. It would keep flickering until i moved the screen on its hinge vigorously or even hit the screen. I got the screen replaced and for the first few weeks it was fine, then the whole pattern started again however this time the screen flickered black; I'm assuming due to the different LCD screen. I went to another shop, told them exactly what I'd done and that I doubted the screen was at fault, but they replaced it and again, the problem is still here. Now the screen will just turn black. It starts working again when I put the laptop to sleep and turn it back on. Any ideas on what the cause could be?

[BlueChinchillaEatingDorito]

The display cable that goes from the motherboard to the display via the hinge might be faulty/damaged. If not, it could be GPU related which would be hard to fix depending on the laptop.

[ProjectBox153]

It could be either the display connector cable or the port on the motherboard. 

[MehMatt]

It's also what I suspect, if its the cable, it seems impossible to replace with the hinge design of my laptop. It's a lenovo z510 btw.