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Red green and blue
It would get dots on the screen if it had not been cleaned properly.
Make sure you have a high definition (720p/1080p) signal; otherwise corrupted EEPROM chip. To prove it place the unit into 4:3 and see if the green dots shift.
pixals
They are dead pixels that no longer are working.
This is either Water Damage or overuse. you will probably need a new screen or harddrive
36
They are most likely dead pixels.
Pixels
First you have to find a save point. They appear as green dots with a white outline on the little map at the right of the screen. Then you click on save. after that, an icon will appear on the screen asking you if you want to return to mode select.
Olympics
red black green