crwdns2934241:0crwdne2934241:0 Jadon Lyon

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When the fan comes on at full power, that's a sign of a defective heat sink.

When the thermal sensors stop working on a Mac, the sensors essentially tell the SMC at startup that Mac is on fire. So, the SMC will not let the Mac boot, and it only spins the fan at high RPMs to try and cool down the system.

crwdns2915684:0crwdne2915684:0:

open