I run a number of IBM 9229s, and over the years have had several motherboards fail. The easiest lazy solution was just to replace the m-board, but in most instances, the computers were still running, but failed to come up when re-booted. Post-card doesn't come up with any codes. Internet tutorials all seem to be aimed at identifying a m-board failure, at which point you replace it. Anybody have m-board fixing experience for 'standard foibles' beyond 'replace leaky electrolytic capacitors' which I routinely do, and that isn't the problem with the m-boards I'm contemplating fixing.