Arduino Nano I2C OLED display 0.96 inches 128x64 pixels

I have a strange issue while trying to run the hello world code on an arduino nano connected to an OLED display.

This is the code I used:

    #include <Adafruit_SSD1306.h>
Adafruit_SSD1306 display = Adafruit_SSD1306(128, 64, &Wire);

void setup() {

  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // Address 0x3C for 128x32

  display.display();
  delay(2000);

  display.clearDisplay();      //this line to clear previous logo
  display.setTextColor(WHITE); //without this no display
  display.print("Hello World!");//your TEXT here
  display.display();            //to shows or update your TEXT
}

void loop() {

 }

But I get this on the display.

Any idea what I could be missing?

Thanks !

You are probably missing nothing.
The simulation of your sketch works:

Your OLED display might do something weird.
I assume that if you buy a OLED from Adafruit, that it will work.
Do you see the logo appearing on your OLED display ?

The address jumper on the back of the display does not seem to match the address you are calling in your code. 0x3C //for a 128x32 display vs. (what appears to be 0x7? (maybe 70 or 78 or 7B) on the back of the board.

However, I would think you would get nothing displayed at all!

If that is not an Adafruit sourced display, it might not be a SSD1306 control chip.

Looks like a problem with the font, the exclamation mark is correct, and the characters are consistent where they appear more than once (the double l in Hello and the o on each word).

I recall seeing a similar when I first used that display. I never knew what the real problem was. It might have been me. You might find this link useful.