Arduino Nano V3 power on problem?

Hi

I have an Arduino Nano V3. Input voltage is 7-12. I use external batteries (1.5V, which is basically 1.3V I believe). I have 8 of them, so 10.4V around.

When I power it on, the Arduino green "ON" LED works. But the project does not work. When I on/off the project few times, finally the blue led next to L blinks and then the project executes (No pattern, as far as I could troubleshoot, just random). What does the "L" stand for, and how can I make the code execute every time it boots?

Thanks for any info!

No code and no schematics is going to make it pretty hard to tell much.

Want to add a lot more detail ?

ballscrewbob:
No code and no schematics is going to make it pretty hard to tell much.

Want to add a lot more detail ?

Sorry about that. The schematic looks kind of like this:

(Heed no attention to the model of OLED and such, it’s an approximate model)

The code is quite simple, to go over some parts, it’s:

Include parts:

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);

Setup part:

void setup() {
  Serial.begin(9600);
  gameOn = false;
  gameInterval = 3000;
  highScore = 0;
  highScoreName = "";
  nameLocation = 0;
  
  //Screen things
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C); //Just a default image I show
  display.display();
  delay(1000);
  // Clear the buffer.
  display.clearDisplay();
}

Basically a OLED, button, Arduino Nano V3 and batteries (8x1.5V)

(The image has few mistakes in there, the GND is connected to Arduino GND; to create the common ground. It all works usually, but most times it does not for some reason. PIN placements on image is a bit off perhaps)