Thanks to the efforts of one of the techs at work we were able to get the sockets and the soldered-on chips that were most in the path of the battery contents safely off the board. I then took the board home and scrubbed and scraped the areas as clean as I could make them. The amount of material under the sockets and chips actually wasn't that bad at all. I think the battery contents must have been a thicker goo, since it didn't seem to be able to penetrate small areas that effectively.
Thus being cleaned I took the board and parts back to work and got them re-soldered in place. Our guys are very well trained so he did an amazing job; you almost wouldn't know that anything was removed. I then put the ROMS and keyboard controller back in their sockets.
Having gotten it cleaned, there was only one thing left to do; put the big boy pants on and apply power.
I installed the motherboard, power supply and new CMOS battery pack into the case and took it outside; just in case the magic smoke was going to come out.
Plugging it into the wall, I threw the switch and hoped for the best......
No sparks or smoke, so a good start. In fact the power LED on the motherboard lit up and seemed stable.
I took a couple of quick readings off the power headers on the board and everything seemed to be within spec.
Bringing it all inside I hooked up the system memory board and a new video card that I purchased for this system. It's a Western Digital WD90C30-LR based board with 1 meg of 0WS video RAM. Obviously not period correct, but it's as fast as any ET4000 card in DOS, has good driver support for Windows/386 and 3.1 and will let me get all the performance out of the machine that I can. Plus I've always been partial to Western Digital/Paradise video cards in an ISA-based computer. A quick change to one of the dip switches on the motherboard let the machine know that there was no longer a Compaq video board in it.
In any case with those installed, I hooked up the keyboard and threw the switch, nervous as all get out.
It lives!
The memory seemed to check out fine and all the other errors were expected, so I turned the computer off and installed the multi-I/O controller and hooked up the floppy drive. Inserting a copy of the setup disk I powered it back up and was greeted with the following.
Feeling confident I entered the setup utility and updated the BIOS.
Apart from being an idiot and getting the date wrong everything else looked perfect. I saved the settings and they seemed to stick on subsequent reboots and after the power was removed.
I will get to work on setting up the hard drive next. I need to prepare some more 5.25" disks with the OS and other utilities, however the 5.25" drive on my 286 literally just died and I'm waiting on the replacement. So this will be put on hold until it arrives.
In any case I'm very happy and relieved. Now the work of building it back up and upgrading can begin. 8-)