Good morning! It sounds like you’re having connection issues between your STWC043LT-01 screen and Arduino. Double-check your wiring, especially the RX/TX connections, as they need to be properly aligned. Also, make sure the baud rate settings in your Arduino code match the screen’s settings. If you’re using a software serial, try switching to hardware serial to see if that helps. Lastly, verify that the screen’s power supply is stable. If all else fails, try swapping cables or components to rule out any faulty hardware. Hope this helps!