Brother HL-L2380DW - Touch Screen won't calibrate - how to replace?

My Brother HL-L2380DW printer works fine but the touchscreen is off. Pressing an icon gives random results. I tried the procedure to calibrate but I am not able to touch the very small white dots during calibration reset. Again, no telling where the touch screen thinks I am pressing. I would like to repair this myself. New touchscreen and a manual to remove and replace.