Can you provide an unobstructed close-up of the SRAM chip?

The EtronTech SRAM in your second picture is the TAG cache. The 256 marking is actually 256kbits or 32kilobytes. The SRAM chips (there should be two of them) are obscured by that molex power plug in the second picture. With the other one by the power supply.
I'm not sure if it's the light but the pins in the bottom right of that SRAM chip under the molex plug look a bit off when I zoom in?

The full datasheet's here if you want to know what's what on that board: http://datasheet.elcodis.com/pdf2/121/47/1214 … 75/vt82c416.pdf

We would love to have pictures of the motherboard both front and back. if oyu have some form of documentation, even better

Ow it's used in the Safari Plus
https://www.elhvb.com/supportbios.info/Archiv … safari_plus.pdf

made a page with the manual and the bioses found so far:
https://theretroweb.com/motherboards/s/fic-pda-2000

evasive wrote on 2023-04-17, 18:39:

made a page with the manual and the bioses found so far:
https://theretroweb.com/motherboards/s/fic-pda-2000

Thanks for adding that info there. I just picked one of these up and this wasn't online when I initially started doing the research on it, but you added it just days after I started! I'll see if I can get some good shots of the motherboard front and back as I have my case appart to investigate adding a slim CD drive. Took quite a bit of digging to find a drive that is 50pin. Ended up finding much of the info at https://www.reddit.com/r/vintagecomputing/com … d_thread_56pin/ after googling for "FIC PDA-2000".

Have you tested it with 256 MB of memory? The manual says the max is 128MB, but I know the chipset can handle 128MB sticks so 256MB seems like it should work.

I'll probably create a new documented build thread for this machine once I get more parts. It's quite a unique compact item for the time.

Unisys Quanta CP aka CWP5002 (also CWP50021-ZA) is also a more well known brand that uses this board/case.
Manual for it is here:
https://archive.org/details/cp-38149779

Someone put two Voodoo 2 in SLI in theirs with a custom 3D printed airflow shroud for the PSU.
https://www.youtube.com/watch?v=womJ8n1ebgI

Apparently this same person also created a BIOS for this board that lets you run AMD K6-2/3 based on the comments.
https://www.youtube.com/watch?v=SRZMe7g_CZc

I had this exact same behavior on an Asus P/I-P55T2P4 and that I was able to fix it by replacing the QFP SRAM chips. I am sure only one of them was actually bad, but I of course guessed wrong about which to replace first and ended up replacing both. You'll need hot air to remove the original chips. As Thermalwrong pointed out, your picture is of the tag chip, the actual cache chips are the two 100-pin QFP surface mount chips above the tag.

Unisys manual and Safari additional info manual added to the page

A defective TAG-RAM chip often results in the same symptoms, so I would replace it first.