Apple, in its infinite wisdom, is telling you that you don't need more RAM.
There is nothing wrong with your Macintosh.
Do not attempt to adjust the picture.
We are contolling the transmission .
If we wish to make it louder we will bring up the volume.
Is we wish to make it softer, we will tune it to a whisper.
We will control the horizontal.
We will control the vertical.
We can roll the image. etc., etc
We will control all you see and hear
https://www.youtube.com/watch?v=FCcdr4O-3gE