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?

Update (11/15/2017)

Solved: Did reset mac nvram

Answer this question I have this problem too

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Comments:

Would you look on the bottom of the stand and give us the model number, it looks like Axxx and the EMC number?

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