We have a Latitude E6540 which has intermittent display problems - it becomes dlightly distorted and difficult to read, and then on some occasions it starts to go white, sometimes to the entent that the whole screen goes entirely white.

I tried updating drivers, which didn't work. I then replaced the screen cable as that seemed the most likely culprit, but still no improvement. We have noticed that sometimes pressing down on the top corner of the laptop makes the display go back to normal.

Anyone any ideas? Is it likely to be the graphics chip delaminating from the motherboard?

Thanks