Q: Macbook white and LED Cinema Display 24 problem

Hello, I have a Macbook White Mid-2010 connected to the Apple Led Cinema Display 24-inch running El Capitan. My Display shows only 640x480, In System Preferences I cannot change the resolution and the OS recognized the monitor as generic.

I tried all including reset the NVRAM and nothing happens

I believe it is a EDID problem. I wonder how reset the display.

Please Help with this issue