I have a Hayward SwimPure Plus SWG with a T-Cell-15. Today the LEDs on the control panel went dark. More specifically, when I turn the system on the "No Flow" LED flashes for a bit as normal. Once it stops flashing the "Generating" LED goes solid for about 10-15 secs then goes out. At this point all LEDs are unlit including the "Power" LED. There is obviously power going to the unit as the LCD Display that shows salt level and water temp among other things is completely functional. My pool is 10 years old but this specific unit is only about 2 years old. Has anyone experienced this? Any suggestions? Thanks.