Laptop stuck on black screen on startup for 3 minutes

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I bought a Lenovo Legion y540 laptop and it had only nvidia gpu, no intagrated graphics card. I was using the laptop very well, but yesterday when I opened my laptop I saw that uhd 630 intagrated graphics card installed by its own. I didn't care first times, but I restarted my laptop I saw that it stucks on black screen for 2,3 minutes and after that screen shows up. It happens everytime when I start my laptop.Specs:I7 9750hRtx 206024gb ram

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