Unfortunately, my story does not have a happy ending. After submitting an RMA request form, along with the required invoice to prove I purchased it, Asrock said they would replace my “out of warranty” C2750D4I for $240. While that is a lot less than the $400 I paid for it in August, 2015, it is still more than what I think is fair.
My position is that the board (through no fault of Asrock), was defective as built. They were made aware if this by Intel, in 2017. They should have recalled those all of boards and notified there resellers.So the fact that my board did not fail until the warranty expired, should not matter. (Then they should go back to intel for damages.)
So I’m quite disappointed. My 4 drive hot swap case has very little clearance, and there are few mini-itx cards that have ECC, and this card was a great fit.
I have decided not to go ahead with the replacement, and instead, buy a Super-micro X11SCL-IF mini-itx board with Core I3-9100F. That only costs an additional $40, although, I can’t use my DDR3 ECC memory. So that is another $100 for 16gb DDR4 UDIMM ECC.