Looking for Character LCD controller (USB and COM)


New member
Hi all,

need to help a user to fix the POS display, it is a 16x2 characters LCD connected with LCD Character controller board (DM4 2120 LCD Character controller),

run the test program found the controller board fail, it need to replace the controller board, search the web found the board has been obsoleted for a long time.

As i do not familiar the hardware, i want to know iss there any product replace this board (DM4 2120 LCD Character controller) and this board is using COM port, i want to know any board with USB port too. Thanks.
Looking for additional LCD resources? Check out our LCD blog for the latest developments in LCD technology.