LCD does not display characters

LCD or LCD I2C LCD has no display. It does not display any characters when running "hello world" example from Arduino IDE. How can we solve it?


Do the following checklist:

In case of LCD I2C, you can check one more thing:

Buy Arduino and LCD

1 × Arduino UNO Buy on Amazon
1 × USB 2.0 cable type A/B Buy on Amazon
1 x LCD I2C Buy on Amazon
1 × Jumper Wires Buy on Amazon
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