Sorry, machine and drive are about 15yo and I doubt the drive has been serviced in that long. Since posting, I found a shorted cap on another board with exactly the same situation. Cap shows short, remove cap and tests fine but found evidence of corrosion and shorting on the traces under the cap. The cap stinks like it is toast. I have ordered 21 capacitors to replace every electrolytic on the boards. After replacing the shorted cap above, the drive fired right up without issue but the cap I used was old. I obtained the OEM specs for the caps in the boards and ordered only ones with higher ripple ratings than what was in it. In talking with a repair shop, this seems a VERY common "update" to replace the electrolytics. No bulging and ESR is testing OK but looks like corrosion developing under the caps is causing issues.
Machine also has about 12K hours on it so safe to say the caps do to plus idle time so probably closer to 20K hours.