I reseated the two cables behind the lcd, as well as the serial cable that connects to the outside of the control case. I also reseated the two sets of female headers that connect to the Rambo board.
I did a continuity check with a multi meter from the female headers inside the case to the serial connector that’s outside the case (tested fine).
I’m able to print via USB fine.
Is there anything else I can?
Thanks
EDIT: Forgot to update this thread. I replaced the LCD and it’s working fine. Looks like the LCD just failed.
If the two cables that plug into the back of the LCD are connected swapped, the display stays blank. Have you tried swapping the cables on the back of the LCD?