CS-ELE09100070 CIRCUIT BOARD CALSPA FOR C2001 CHIP# C2001R2A BALBOA# 51662 To determine what board you have look at the lower left corner and on the black computer chip. ---------------------------------------------------------------------------------------------------------------VERY INPORTANT: IF YOU BOARD NUMBER ENDS WITH A LETTER THE REPLACEMENT MUST BE EQUAL OR GREATER TO REPLACE THAT BOARD. EXAMPLE: C2001R2A --- THIS CAN BE REPLACED WITH A C2001R2A -R2B-RC- R2D - R2E - R2F ETC BOARD. These numbers will identify the board.