Screen Blinks at Login

I did a test, just to find out something. If I set my computer to only turn the screen off, but not put the computer to sleep and it turns the screen off, when I bring the screen back on by pressing the space bar the computer screen comes on, then blanks, then comes on. Nothing to do with sleep mode.

Have been busy. Refuse to get rid of Norton. Found a virus on my previous Mac Mini and refuse to operate a mac now without protection. The virus slowed my old mac to a crawl. I did find out that the screen blinks when I bring it out of sleep mode and don't have to use a password to get into my computer. Also, I have checked and it will blank even when there is over 1GB of memory free, so it is not a memory issue.

Here is the report from etrecheck.

Just thought I would attach a recent EtreCheck report for you to look at. With my Mac in that condition the screen still blanks once when I wake it from sleeping.