Upon attempting to start the car, the dash goes dark, momentarily, and when the power comes back, all the Settings ( clock, date, radio presets are gone).
Check battery first, may want to take to auto parts store who does free checks. Make sure to do a load check in battery. If thats good check connections to battery. Check good ground to car frame and engine block ( follow the black cable from battery to have good connection to other end ). Some cables may have damage or gunk on it can couse bad connection. Try that hope it helps.