Question about Apple 21.5" iMac Desktop
Replaced HDD with same manufacturer but larger capacity. Sensor cable fit perfect as original, but fans running fast. Did hardware test and came up with this error code...4SNS/1/C0000008 TL0P==124
It's a temperature sensor error, usually the fans run at maximum rpm when this happens. The error indicates the LCD temp sensor is either reporting out of range data, is disconnected, or has failed. It is probably a damaged or disconnected sensor cable. A disconnected or missing sensor would simply force the fan(s) to run fast to protect the system.
Posted on Dec 07, 2013
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Posted on Jan 02, 2017
Its an issue with the hard drive in the lower slot. The volume may be
corrupt of the drive could be physically damaged. Did you install the
bottom drive? is it the drive with the OS installed?
What does SMART statues report in DISK UTILITY?
Hard Drive/Application/Utilities/Disk Utility
Let me know.
Posted on Oct 28, 2007
I hope this works for you it did for me when I updated all my firmware.
Posted on Apr 16, 2008
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