I did. I then either get the screen showing either the above picture or flashing a kind of "snow". The pic below is not 100% what is visible to the eye.

Hi I have moved/replaced resistor R3 to R4, strapped R5 and R7, connected DC and CS to ground and connected RES to Vcc. My i2c scanner either reports "No I2C devices found" or "Unknown error at address 0x..". If I unplug the display and pop in one which is only an i2c device, it ...