Sony PlayStation Portable (PSP) Console "battery bathroom switch" Questions

...battery out fixes it. It has become very sensitive to this....like a connection is loose. Help anybody!!!! This is the second PSP this family has had, The last one was dropped in the toilet (now all ...

...Battery is good with 4 volts. Any more ideas?? Thank you. i have looked at the motherboard, nothing seemed burnt out. To what I can see anyway. Only thing I could see was on the back of the screen on ...