1497 2 means game is botting to audits mode .. doesn't really help with telling you why .
I quick turn off/on a few times doesn't work , and batteries are around the right way , and there is continuity from the battery holder to the CPU board .. try changing the batteries again (or check the voltage of the battery pack) .. typically this symptom (only booting to audits mode) means game is detecting backup battery voltage is too low .. especially if the game was botting up properly before you changed the batteries .. unfortunately there could be something else wrong though .. have a read here

http://www.pinrepair.com/sys37/index1.htm#battery