Why is my screen white-ish?

After I patiently replaced my cd drive with a SSD, the screen is turned White like you see here https://imgur.com/a/Qhn24

I did this kind of job for like 5/7 times, and the problem never occured..

I checked and replugged all the cables, and changed the settings about screen but nothing is helping

Is there anyone Who knows this problem?

Solved: Did reset mac nvram