Why does my 1998 furby only work when I press on the bottom of it?

Why does my 1998 furby only work when I press on the bottom of it?

I bought an older furby off of eBay a while back and when I received the furby in the mail, it didn’t work unless I pressed on the head and base simultaneously. I took it apart and realized that if I pressed a certain corner of the circuit board it would work fine. Does anyone know how to fix this?