lcd shows gibberish. need help.

working with mega 2560 with lcd display.
after some stepper actions the lcd started to show gibberish.
"clear" command not helps, only controller reset.
need help.

Need detail.

This isn’t an installation issue.


Moved your topic to it's current location / section as it is more suitable.

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Do not power the stepper with the Arduino.

powered from separated p.s.

may be changing to i2c display will help?


Maybe neaten up the wiring.

Maybe a better driver.

Maybe add SWC.

We can carry on the guessing game as long as you like. I, for one, am done.

If you really want help, please provide a schematic showing all components and power supplies, specs of the power supplies, motors and drivers and your code.