I’ve got a Sparkfun serial LCD that used to work fine. As so many of us have done, I forgot to unplug it once while programing the Arduino. In the process it turned off the backlight and I’ve been unable to turn it back on. I’ve searched sparkfun’s forum and this forum and haven’t had any luck despite trying all the fixes I’ve found. Here are some:
I’m fairly certain the baud rate is correct as I’m able to send characters to the screen. Also, strangely enough, when I run this code:
It functions correctly EXCEPT for turning the backlight on. My theory is that all commands sent to the Sparkfun LCD backpack are not working, while all commands sent to the HD44780 (clear screen, line select) seem to function properly.
Please help! Frustration is looming!
EDIT: I should add that when attempting to perform the baud rate reset (send r during splash screen) I do not receive any acknowledgment that the serial rate was reset as some folks have described on here.