Matrix Orbital Corp

Hi,
I have a previously working LK204-7T display, which is being controlled by an Arduino Uno over I2C. After a bug in the code in the Arduino caused it to spit random data at the LK204 yesterday, the LCD will not display data or the welcome screen. The random data error did result in some settings being overwritten, which I recovered by putting the lcd in Manual Override and reconfiguring.

At present, I can read from the keypad and update the LED outputs, however the LCD functions are completely not usable. I have tried changing contrast and backlight settings to no avail.

Hello Dave,

Thank you for posting on the forum.

While you applied manual override on the LK204-7T, did you save the settings?
Can you please send me an image of the display, and how it is not working?
Please email to support@matrixorbital.ca

Thank you,

We are having a similar problem.
How do you save the settings?

Thanks!