I'm in the wrong location to help you out, but judging from the pics, that doesn't look too bad at all. You might want to give fixing it a shot yourself. You probably only have to remove the battery and clean up the PCB and ISA port. No repairing broken traces, etc.

Desoldering the battery is a simple job if you got a reasonably high power soldering iron, since the pins are kind of flexible, and there are only two of them. Just melt the solder and pull them out, one at a time. Or, you could just snip the pins off and remove the battery, if you're ok with leaving the pin ends in the board.

A small fiberglass brush is useful for cleaning up both the ISA port and PCB. Bernstein model 2-168 is my weapon of choice, if you want something more specific to look for.

looks easy enough for a child to fix.

hard1k wrote on 2020-09-23, 10:59:

The board won't include any EDRAM SIMM sticks, I'll purchase them when/if the board is confirmed as working.

I'd like to know where you want to buy them.

I have a ton of 72-pin SIMMs. I gather that the EDRAM is a 72-pin SIMM with integrated SRAM instead of having the L2 cache on the motherboard.

I never knew such a thing existed.

How are EDRAM SIMMs identified?

If nobody else offers help, I could remove the battery and clean the corrosion. Not sure if I would want to try desoldering it though as I really hate what the leaky batteries do to the solder.... turns it into a weird substance that doesn't like to melt.

I would probably just clip the leads on the battery.

From the pictures, it needs a new 20-pin Dip socket for the PAL chip between the ISA 8-bit slots. Hopefully the chip itself doesn't need replaced and can be cleaned without breaking the legs. It also needs a new 8-bit ISA slot, and a new 32-pin DIP socket for the BIOS chip, which also appears to have corroded legs. That SIMM slot is awful close to the battery too and needs a closer evaluation.

Overall, that's a pretty easy and cheap fix. The battery will come off without issue and the solder mask can be cleaned up and reapplied.

cyclone3d wrote on 2020-09-23, 15:10:

How are EDRAM SIMMs identified?

They usually have "Ramtron" or "Enhanced" (Enhanced Memory Systems) branded chips on them.

I can do this sort of stuff. PM if interested.

BastlerMike wrote on 2020-09-23, 15:24:

cyclone3d wrote on 2020-09-23, 15:10:

How are EDRAM SIMMs identified?

They usually have "Ramtron" or "Enhanced" (Enhanced Memory Systems) branded chips on them.

I looked through 200+ 359 72-pin sticks of RAM and not a single one. And that is not counting the sticks I currently have installed in systems.

Almost every single one of those sticks came from scrap lots. There are 197 of them that I need to test to find the size.

Yeah EDRAM is a bit rare, not sure why they tried that method (or RDRAM for that matter ;p ).
Good luck on your board ! Hopefully it can be fixed. That board must have some special meaning to you to search that long for one.
just read thru one Ramtron EDRAM PDF and the cache size is very small compared to standard typical cache:
"4 - 4MB SIMM 16MByte - 8KByte cache
4 - 8MB SIMM 32MByte - 16KByte cache
4-16MB SlMM 64MByte - 32KByte cache"
If that true you may not be able to get more than 32k cache, unless I misread the PDF