If electronic loads have been failing frequently, you can probably find the root cause at the distribution panel(s) supplying those loads.
First, trace the problems to their common point of supply — the last (electrically closest to the load) panel common to the affected equipment. You should look for:
Power issues: Voltage, current, and harmonics.
Physical issues: Connection integrity and bonding conformance.
Check the bonding against NEC Art. 250, Part V requirements after reviewing the definitions of grounding and bonding in Art. 100. Don’t “retorque” connections, as this actually degrades connections. Instead, use a thermal imaging camera to look for hot spots. Don’t tighten the connection and call that a repair. Ask yourself why that connection is loose in the first place. Probably, the fasteners do not clamp properly and thus need replacement.
