Oh dear, seems like a virus getting around at the moment - lol , would it be just easier to just replace CPU board as a whole (with chips), I have seen them around on net for $150-200 ?

Swapping the whole CPU board is always an option but you would also need to swap over the actual firepower game roms from your board.

Jomac http://www.jomac.net.au/ in Perth do repairs if you wanted to send your board out or else several members of this forum also offer board repair services.