I just replaced my Aquarite PCB board, LCD display board and a new T-cell 15. Everything now works however, my salt reading on the aquarite is reading about 500-600 points higher than my test strips. I live in MA and opened pool very end of April. I waited until water temp was above 65 degrees and then added 120lbs of salt. Everything was perfect and then my LCD went 2nd week in July...no lights at all. I've not added any additional salt since opening. My salt on the display reads 3800 and on the test strip reads 3250. My test strips expire 8/2023. Could they be already expired? I have tried recalibrating several times but the display stays at 3800-3900. Any thoughts? Thank you!