I picked up a very nice SE/30, outside condition very clean. I booted it up and got a garbled screen. The hard drive was running, but very noisy. I have an external drive that I wanted to use to replace the internal drive with. I popped off the case and was surprised by the mass of brown corrosion surrounding the pram battery!! The mounts for the battery were eaten away and some of the surface mounted components nearby were eaten by the corrosion. The edge of the video chip was also badly corroded. Sort of put a hold on my project. The unit was assembled in Ireland in May of 1991. I kind of think the motherboard is finished ? I have an SE motherboard that I will try and use, it should work. I am thinking that any SE/30 motherboard will work? Any comments ?