Thanks, Randy. Thankfully, I now have my buggy back in the corral. Here, verbatim, is what they said on the work order:
Installed 68060701AD :CLUSTER: INSTRUMENT PANEL680 Qty: 1
PERFORMED RRT, REPROGRAMMED CCN, BUT FLASH FAILED
AND CRUSHED CCN, UNABLE TO RESTART FLASH, ORDERED
AND REPLACED CCN, SYSTEM IS NOW OPERATING AS DE-
Whew. I guess that now, unlike 30 years ago when I did it for a living, mechanics are IT guys, too!
And at least the turnaround was quicker than expected. On Saturday, they predicted I would have it back by Thursday or Friday, but it was done by Tuesday afternoon.