My water damaged iPhone 4 won't restore!

Not long ago I dropped my i phone in a cup of tea, it messed it up pretty badly. After changing the battery and cleaning it up a bit it now seems to work perfectly fine...UNTIL. It works fine until I attempt to restore it. It is currently stuck in safe mode and all I want to do is restore it.Whenever I try i comes up as an unknown error (-1) or (9). I've since been told that thi is a hardware problem. So I'm interested to know i anyone knows how fix this...a sort of DIY hardware fix.

Let me know,

cheers