Broken tablet - Nokia T20 (TA-1392) - Where to start finding the problem? No sign of life except on PC connection (Unknown device)

Hi everyone,

I've recently gotten gifted a broken Nokia T20 tablet (ta-1392). The hardware is nice with a FHD screen so I figured it's worth having a go at repairing it (to maybe use it for Android Car or some hobby project). I'm a pretty huge nerd but I have close to zero experience with phone & tablet hardware. Programming, hobby electronics (Arduino, ESP32 etc.) and 3D printing is what I mostly do. I'm always interested to learn new things however and if I can fix this tablet perhaps...

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