Problems with 1602 LCD Screen

Hi guys!

I tried my LCD screen with Hello world tutorial (http://www.arduino.cc/en/Tutorial/HelloWorld) with Arduino MEGA but I only get this on LCD:

I check my connection several times but seem everything is OK.

Any suggestions what should be wrong?

Thanks!

Find the problem!

Problem was in bad wiring! :)

gapl: Find the problem!

Problem was in bad wiring! :)

And that is perhaps 90% of the time. :astonished: