A320 radar
Happened to me flying an A320. Domestic flying and lightning struck the radome knocking out the radar. Late afternoon in Asia during the monsoon and trying to revive the radar didn't work. Ended up following a higher flying aircraft using TCAS as a guide. We still got a few thumps though.
Destination TAF was typical TS and our ETA was well after sunset. I diverted and landed at a nearby airport, wrote up the strike and the busted radar. Engineers fixed the radar quickly by simply resetting the breaker on 121VU. It never popped but the reset worked.
That's one breaker or CB (no pun intended) location worth knowing about. Right behind the FO's seat. I'd had strikes on the Boeing but never had the radar fail unlike this experience.