Just an update to my last post. I took the machine apart again and using a can of air blasted all the dust out. I then checked all the connectors and made sure everything looked ok. I pulled the temperature sensor from the drive and the board and then reconnected it, ensuring that the connections were good. I reassembled the machine, plugged it in, and booted it up...same issue. However, my fan will eventually reach about 4.5k RPMs and stay there, not the 5k I reported earlier. Some things to note, the model# for this machine is EMC No 2374. All other fans, and temps, look normal. The HDD temp is at 38C, but the HDD fan is at 4524RPM. The drive I bought, following the guide, was the Seagate model# ST31000524AS. The drive that I pulled out of the machine was the ST31000528AS. The differences can be found here:
The ST31000524AS is a 6Gb/s drive whereas the ST31000528AS is 3GB/s:
Barracuda SATA Product Manual, Rev. A (ST31000524AS):
ST31000524AS
Barracuda 7200.12 Serial ATA Product Manual, Rev. C (ST31000528AS):
ST31000528AS
I went ahead and purchased the ST31000528AS from another site to see if that makes a difference. If it does, the step by step guide might need to reflect this information. I'll post an update once the other drive is installed. Some more system info:
Model Name: iMac
Model Identifier: iMac11,1
Processor Name: Intel Core i5
Processor Speed: 2.66 GHz
Number Of Processors: 1
Total Number Of Cores: 4
L2 Cache (per core): 256 KB
L3 Cache: 8 MB
Memory: 12 GB
Processor Interconnect Speed: 4.8 GT/s
Boot ROM Version: IM111.0034.B02
SMC Version (system): 1.54f36
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