Debbie

My roommate spilled water on the control panel. Went PF. Called Frigidaire they said let dry out. So we did. Replugged it. Worked for about 2 months. Now it says PF when I plug it back in and if I hit any buttons they don’t work. But it shows 37 minutes, then changes to 38, then back to 37, 38, 39 but nothing happens. Do I need a new motherboard??? or what???
Do you think I could do this myself??? Should I call a repairman??? Or just buy a new one?