Was rough with my laptop the other day (Lenovo IdeaPad Y500), and when I opened it, the LCD was wonky. Black or dark colors look bright red and every other color "shivers" in an epilepsy inducing way. I did some of my own diagnosis and figured it was a faulty cable connecting to my LCD. Just want to make sure you all agree with me, and maybe give me some advice on how to proceed.
Troubleshoot 1: Plug laptop into external monitor to see if it's the graphics card.
Results: Second monitor looked fine, so I'm ruling out the graphics card as the issue.
Troubleshoot 2: Squeeze the screen around the edges and in the center (basically all over) to see if the screen discoloration changed at all.
Results: No change whatsoever no matter where I pressed. Makes me think it isn't a bad screen.
I haven't actually opened my laptop yet, waiting til I can get back to school where I'll have access to a work bench with static bracelets and the proper tools, but I'm guessing I either loosened or damaged the wire connecting to my screen, and that I'll need to replace it if resetting it doesn't do the trick.