Did anyone find a solution to the "half the chips on a module stopped working" problem? I believe there are two unlabeled fuses, and the running theory last I checked was one of these might have blown. I can fix the FUSE1 problem, but not the "5 out of 10 chips cold" issue.
Actually, that was only my theory IFF you don't have a single "FUSE1" fuse. In the case where there is no "FUSE1" silkscreen marking and corresponding fuse, then (at least on my modules) there are 2 "P" fuses side by side about in the same place, and I would expect that one goes to half the chips and the other to the rest. If it's on a module with a "FUSE1" board, then I don't have a running theory - could be a loose capacitor to half of the VRM, not sure.