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I just bought a new early '12 Macbook Pro 13" and was about to open it to swap that pesky HDD with a fresh SSD. After lifting the first screw I saw that the screws are blue on one side.
I'm asking myself why they are like this. Is that a measurement to detect if the warranty has been voided? If yes, how can I still replace the HDD without voiding the warranty 'further'
I've also seen this on Acer and Dell laptops. It must be pretty common. – Zaz – 2016-09-04T12:23:17.053
From what I've been told in the past it's also to check if the warranty has been voided. – cutrightjm – 2012-06-24T21:55:42.407
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Replacing a User Serviceable Part does not void your warranty, as Apple would not provide you instructions on how to do something that would void your warranty. You can find instructions in your Macbook Pro manual http://support.apple.com/manuals/#macbookpro as to how you go about replacing your hard drive. The Locktite used on those screws is to keep them from falling out on their own. Yes, I know that screws don't normally do that, but the single drop of locktite is added insurance that they don't. It is not a system by which they can avoid being held to the warranty.
– Bon Gart – 2012-06-25T03:49:52.710