lcd 16x2 shows only background light

I've followed a lot of tutorials but i cant get this work. i use an arduino mega and it's my first arduino so i dont now if it'a a arduino problom or a display. if u need to know some more information just ask me. Thanks for your time.

Probably neither. I suspect operator error.

Don

floresta: Probably neither. I suspect operator error.

Don

Thanks for your reply Now it work.... only fault was that i haven't solder the 16 pins so there wasn't any contact with the V0 so it wasn't showing anything. Noi i'm wondering how i have to work with the LCD without soldering the pins... do you have any idea how can i do?

You need to solder the pins at least to the display itself!
After that it MIGHT work that you place the pins into a stackable header row on a board, which is properly connected with your Arduino (although imho the whole construction doesn’t make much sense and is a source for failure).
Those LCD displays are very critical and won’t work at all, whenever a connection is not solid.

Question: why do you want to avoid soldering them ?

rpt007: You need to solder the pins at least to the display itself! After that it MIGHT work that you place the pins into a stackable header row on a board, which is properly connected with your Arduino (although imho the whole construction doesn't make much sense and is a source for failure). Those LCD displays are very critical and won't work at all, whenever a connection is not solid.

Question: why do you want to avoid soldering them ?

i dont have one ;) But i did it with out, here's a photo:

https://hostr.co/sH4xvWSLHFkL

https://hostr.co/bELo1xlBpPcR

thanks for your time

thanks for your time

You are welcome.

But, don't be astonished when your configuration will work as a real digital one: WORKS - WORKS NOT - WORKS - WORKS NOT

The second you touch your non-soldered configuration and move it a little aside - you will see the "digital" effect.

If you want to continue with Arduino and peripheral devices like a display which doesn't come with pin headers soldered, go and get a solder iron and learn how to produce good connections.