So within the past two years I've purchased two Sunleaves four foot four bulb ballasts. Both have worked excellently. Just came back from a few days at the parents and one of them is completely unresponsive. Amy experience on if I can fix this in any way? Have the original box, mentions a five year warranty, but no receipt. Could possibly have them pull it up at the hydroponics store. What could have gone wrong? Mostly just need to get a replacement asap for my plants...