My display sometimes turns partially black or has strange lines
When I open my MacBook's display, it displays these strange coloured lines, and sometimes parts of the display are black or discoloured. These go away if I flex the display a few times.
I suspect that the problem is a loose or damaged ribbon cable, but I worry that if I take it to Apple, they will replace the entire display and charge me around £400 for it. Is it something I could try and repair myself, and more importantly, is it something I could fix without Apple noticing and refusing to fix my computer ever again?