The pump was turned on for the first time this season. The pool company just left a bill in the door with a note" no display". I went out to look and the display was on and I checked the salt level. I went to add salt and then ran a system check. After that the display just read "purifier" which I had never seen before. Then some of the letters in "purifier" started going and now nothing. I changed the battery and no display still. I have seen a few posts regarding no display but no remedies have been posted. Any ideas out there?