Nintendo SWITCH | Faulty GAME CARD Reader & Doesn't DOCK | Trying To FIX

I've bought a Nintendo Switch off of eBay. It does power on, but doesn't read/play any games ("Game Card Could Not Be Read" Error) and also won't dock and display on the TV.
Let's try and repair it!
Hope you enjoy!
Steve
PS. I'm not an expert in repairs at all. I do this for fun, and it may not be the best or safest way to go about repairing broken stuff. I'm pretty good at melting plastic though. Please don't copy me - I'm an idiot.
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