Did you try re-socketing the two Kickstart chips? Some people just press down on them to revitalize the machine, but you're better off fully removing the chips and reinserting. Before you do that though, take a good look at how those chips are situated. Make sure you re-install them exactly as you found them. Two of the pins on each socket are purposely not used (the ones on the left of the chip IIRC).
