Prologic Controller has been losing time for a week and finally stopped all together. I've checked what I can with multimeter. Supercap C3 for power outage seems to charge up. Voltage (approx. 5VDC) on the U2 time clock chip when controller is powered. Time Display has 1 second blinking (Colon) ":" BUT time of day is stuck at where ever I set it. Have read other threads about parts people have just replaces (in lieu of buying a new board $$$). The candidate parts to replace are C3, U2, and the crystal (X2)? all available from DIGIKEY. [Note these are surface mount parts - requiring some skill to replace]. Any suggestions on course of action would be appreciated. For now, I AM THE CLOCK for the system, controlling pump circulation ON/OFF daily. UGH #@#@#