My 16*2 LCD display works erratically. Please advise.

Other Hardware Displays
1

my 16*2 LCD display work sometimes and most of the time does not.
this is the code I use with LiquidCrystal library.

#include<LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  lcd.begin(16, 2);
}

void loop() {
  lcd.setCursor(0,1);
  lcd.print("This is a test");
}

I connected rs to 12
en to 11
D4 to 5
D5 to 4
D6 to 3
D7 to 5
sometimes this code works otherwise either the screen is blank or the top row darkens when i crank up
the darkness.
Any ideas how to remedy this?

2

See what happens when you display your message in setup() and leave loop() blank between the brackets.

Don

3

Could be bad or loose wiring, or bad solder connections to the LCD module.
Can you post a photo of your setup?

--- bill

4

Try to power arduino via extrenal power not USB. Or USB via AC plug same with you charge mobile phone

5

tried all 3.doesnt work. still thanks for the advice. sorry i took so long to reply. hate that lcd screen >:( >:( >:( >:( >:(