reference sec B of letter stating "Reasons for Return":
B – BAD CAPACITOR
The dust layer on the board and thermal compound on the cpu bed did not improve my mood but after cleaning it up a little, I took a closer look to be certain I had gotten most of the grease off (I could only hope it was a non-conductive variety; if not then it probably would certainly have shorted and possibly damaged any cpu I put in.) Closer inspection revealed a bad capacitor just behind the back panel outputs which is not discernable in the picture from the listing (though I did use it to point out the location of the bulging cap.) Thinking this was an unusual place for just one capacitor to fail, I then took a closer look at the caps nearest the cpu bed.