This is a uniden handset Model #TRU9488

I left one of my uniden phone out in the rain face down. I took the battery out and let it

dry. I put the battery back in after a week and it seems to work except for the 2 and 7 keys and the redial key. Can this be fixed or do I have to get a new phone.

I opened the back of the phone and I don't see any problem. What am I looking for?