Lcd1602 with i2c after turn on and off light every 0.5sec

Other Hardware General Electronics
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Greetings, I have an Arduino Uno connected to an LCD1602 with I2C for displaying messages.

Upon powering up the Arduino, the LCD's backlight flickers on and off every 0.5 seconds intermittently, but the Arduino itself does not function.

I discovered that if I disconnect the VCC and GND pins of the I2C and power up the Arduino, it starts
working. Subsequently, I reconnect the VCC and GND pins of the LCD, and the message appears, allowing the Arduino to function correctly.
I have attemp with some power supply 5v 2A, but didnt resolve the problem.

Could you assist me in resolving this issue? Thank you!

2

I will take a SWAG and say you connected it backwards and blew the LCD module. When you plug it in it causes the regulator to get hot and shut down, it cools down and turns on, this will repeat until something else fails.

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