Introdução
A simple guide on how to remove the rear cover from your Dell Latitude 5420 to fix/replace things!
Ferramentas
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Overall this is a pretty easy cover to remove - there are 8 encapsulated screws to remove, all Philips #0. Start by loosening all 8 of these screws.
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After you've loosened all the screws, you should be able to pry underneath the cover between the screen hinges and gently lift the cover and separate the clips that hold the cover on to the main chassis. Once these are removed the cover should pop free.
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From here you should be presented with a view very similar to this - I'd first recommend removing the battery before proceeding with any other steps, but it's pretty straightforward to remove the CPU cooler to repaste, replace the RAM, replace the WiFi card or to replace the M.2 SSD's from here.
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Since you're not opening this just for funsies, you'll likely want to disconnect the battery before proceeding. To do so is pretty straightforward - take a non-metal tool (a plastic spudger preferably) and gently wiggle the battery connector straight up until it's as per the pictures. You can then bend it slightly out of the way.
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To reassemble your device, follow these instructions in reverse order.
