Mac Pro 5,1 PSU humming noise after revived from catastrophic hardware damage

By Guest DamnTrain
March 6, 2022 in Archives

https://extremetechsupport.com/topic/1208779-mac-pro-51-psu-humming-noise-after-revived-from-catastrophic-hardware-damage/

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Guest DamnTrain

Posted March 6, 2022

So the background story is, I got a Mac Pro Server (5,1 MC915LL/A) that had a very harsh life: It went right into a huge bang and tripped the circuit breaker of the house after being powered on for the first time. The reason is left unknown but probably due to internal condensation as it's just being lugged in from about -10°C environment to room temperature. Took it to a mending shop, diagnosed that the CPU tray is dead but the PSU is okay, replaced the CPU tray and it's back to life.

But...

Source: MacRumors