Just fixed my board, The veristor at the top right hand side of the board was burned out. Digi Key has them at a cost of around $2.59 each. Make sure you check this before you buy a new board. This is a common problem with these boards. This is an easy fix, took me about ten minutes. I suggest you put an inline suppresor on this board. Don't be fooled though, this problem occurs because the cell is dirty and it draws more current through this device. Keep your cell clean and this should not happen.