Einleitung
This guide will show you how to replace the hard drive cable in your Latitude E7440/7450. If your machine is having unusual issues with sleep and hibernation not working correctly, this is sometimes related to a intermittent hard drive cable that is beginning to fail, but still works. In other cases if your drive no longer shows up, it can be due to a bad drive, cable or motherboard.
Due to the low cost of this cable (or in my case, I kept a spare on hand just in case), this can quickly rule out the hard drive cable so you can looking at a potentially deeper issue that may be causing your problem. In the case of my E7440, the machine is not properly hibernating. This has occurred since the original installation of Windows 10, and 2 wipe and reloads. I am changing my cable to make sure it's not a issue with the SSD or motherboard.
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Power off your laptop before starting.
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Flip the device over so that the vents on the bottom are facing away from you.
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Place your finger on the latch located in the center of the laptop.
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Slide the latch to the right, applying enough force to reveal a red indicator.
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After removing the battery, remove the 2 screws securing the service panel.
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Slide the panel off after removing the screws.
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Pull the tab on the drive cable up to disconnect it from the motherboard.
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Deroute the hard drive cable from the system.
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Once the old cable is removed, partially install the replacement cable. Final placement is done with the drive installed.
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Reinstall the drive into the laptop, and setup the final cable placement.
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To reassemble your device, follow these instructions in reverse order.
