NFL Blitz Pedestal Deluxe Repair

[Prettyswell]

I have an NFL Blitz 2000 that was just working great a few months ago. It is kept in a climate controlled area, gets very light use, and is in pretty good condition.
Today it started with an issue. The test screen shows up and I am getting a "Sound DRAM: DRAM failed" and the machine doesn't boot. Everything else is good, even the Sound SRAM is "OK".

I measured the caps around what I think is the sound circuitry and they all seem to be getting a clean 5.2V (not the best multimeter).
I'm assuming sound ROM is good considering everything else passes.
From what I can gather the area of interest on the board is the ADSP-2115 along with the 3 RAM chips nearby (IS61C256AH-15J).
I used a thermal image camera on bootup to see if I could find a clue but those chips seem to warmup evenly and expectedly; No anomaly.

The only path or solution I've been able to think up is to just replace all 3 IS61C256AH-15J chips and hope that fixes the error.

My question: Has anyone experienced this issue? Does anyone have any information that could potentially help me?