My PL-P-4 panel died overnight. No power to the display and from what I was able to gather from this https://www.hayward-pool.ca/pdf/manu...4.45v2-TSG.pdf my 24V AC is fine, 120V AC supply to the panel is fine, fuses aren't blown however there is no DC voltage between pin 1 and pin 3 of connector to display (step M of the link above).
Unfortunately, their solution for "no voltage to display" is to replace the control board and I'd rather avoid this if it's a simple component that I can replace (like on the aqua logic where the varistor breaks and for $10 you replace it and are good to go for a few years).
Does anyone have a schematic of the panel? I'm really navigating in the dark trying to identify where the problem is. I'm thinking that it might be the varistor (the red one, bottom right corner in picture on page 2) but I'm not sure what it feeds exactly and there was no thunderstorm last night so a power spike is unlikely (and nothing else blew out in the house). Plus, visually, everything looks good. No burnt solder anywhere.