CS-ELE09100210 CIRCUIT BOARD CALSPA C3000R1F 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: C3000R2C --- THIS CAN BE REPLACED WITH A C3000R1F - -- ETC R1H -BUT NOT A RA-R1B OR A R1C-R1D-R1E-BOARD.