Constant white screen but able to login
My MacBook is displaying nothing but a white screen. I somehow was able to login to the computer. I know this because I was able to play music using the multimedia keys. I've tried resetting nvram, smc, command + r and followed all other guides which tackle the white screen problem. But none of the guides have helped me fix my issue. I can see black smudges on my screen sometimes. I booted with command + r, and I could see a greyish window (looked like a rectangular black smudge). I'm guessing that was the window which shows recovery options (reinstall etc). So I can confirm that my hard disk is booting up fine. What might be the problem?