I replaced my Rheem Ruud

Question

I replaced my Rheem Ruud 62-24084-82 Ignition Module Control Board in my Rheem gas furnace last year. Has worked great until last night. Now blower purge motor starts but does not go into ignitor cycle. On board power light is ON(AN1)but green light next to it (AN2) is intermittently going on and off. I am trying to determine cause of malfunction.