Thanks for all of your advice!!!

More information about my work:

The LCD I'm using is from Truly, 128x64 pixels.

The I/O pins of uP are connected directly to the LCD pins via the ribbon.

All the messages on the LCD disappear, not fade-out. Sometimes, the messages can last for a few hours, but sometimes, just 15-20 minutes.

I have tried pressing the reset button connected to the uP. The messages stayed where they are until I released the button.


Winson