There are two types of LCDs used in the PM2. The difference is the number of contact pads along the edges of the LCD. PN1416 has 43 contacts per side while PN1405 has 64 contacts per side. To determine which replacement type of LCD to use, check the number of black contact pads on the back (solder) side of the printed circuit board. This will require removing the printed circuit board from the PM2. for more Please check the pdf for Concept2 Rower PM2 LCD Replace Instrux