MCUFRIEND 2.4 TFT screen 9340 not working


Just bought a MCUFriend 9340 tft screen, and I can’t manage to get it working. I’m using an Arduino Uno.
It gets power, but that’s all I manage to do with it, as I loaded the MCU library, and tried the graphictest_kbv, but nothing happens.

Adding an image of what the screen looks like.

Any ideas?


Please install/update MCUFRIEND_kbv and Adafruit_GFX via the IDE Library Manager.

Run LCD_ID_readreg.ino from the examples.

Copy-paste from the Serial Terminal (9600 baud) to your message.


Please look at this message thread about 0x9340

Follow my instructions in #12. Compare your results with ammbt's results in #13. Compare with my comments in #14.

Please provide feedback. Not only could it help you to get your screen working but it would help every other purchaser.