First I just want to thank everyone who reads this, it's great to have such a dedicated community helping with these issues!
Here's my story:
I reopen my pool for the end of spring/beginning of summer, and notice my Hayward panel/box doesn't have a single LED on. The display gives me my salt ppm reading (2800), but no LEDs are illuminated. I have a Hayward T-Cell-15 installed. Long story short, here's what's going on.
No Flow LED blinks red for a little bit before turning off, then the Generating light turns on (solid green) for 10ish seconds, then it turns off. All LEDs are off. I've seen videos about replacing the current-limiter, which I've ordered and am waiting for, but here's the real kicker. I actually bought a brand new Hayward circuit board AND a brand new T-Cell-15 and installed them both, to no avail. Even changed out that little flow sensor with the phone-jack connector with a brand new part, everything is still as broken as it used to be.
What are my options here? Is it likely that the new panel is also broken? I'm really hoping that soldering a new current limiter on my old board will fix everything, and that the problem doesn't lie somewhere deeper and more expensive to fix... Any feedback is much appreciated! Thanks everyone.