[color=FF0000]Do NOT use baking soda on any circuit board!!![/color][/b] :-o
Isopropyl Alcohol safely neutralizes leaked battery acid on the circuit board. Use 100% alcohol with a toothbrush and brush all affected areas. Then use 50/50 alcohol/water mixture to rinse the board.
If any components are affected, they must be replaced. If you do not know how to replace components on a circuit board, let a qualified technician do it for you.
Hmm...haven't I stressed this with someone else's battery-leaking problem?