General

So I got a used gaming laptop last year (?) that technically runs great and does what it's supposed to do, but when it comes to the actual physical laptop, it has become far more trouble than it's worth. If it's not the fan randomly dying and making grinding noises, it's the keyboard buttons doing goofy crap out of nowhere despite literally nothing happening to cause that.

My main issue is the screen. With a simple moving of the laptop, the lower left hinge of the screen casing snapped and now I need to treat the thing like an ancient relic when moving it and placing it anywhere. The actual casing for the screen is opening up a bit at the bottom, forcing me to place it ever so gingerly to ensure it stays mostly shut, so I'm just waiting for the day one small movement splinters the screen to hell.

I plan to get it repaired eventually, but at this point, I don't want to use it as a laptop and would love to just use it as a desktop. I looked up whether or not it can run with the lid closed. Apparently you can set it to "do nothing" when the lid is closed, meaning I'd be able to hook up an external monitor, keyboard and mouse, and then close the lid and still run it as if it were a desktop (with a fan pad underneath of course).

My question is: if I do this and then shut down the laptop, will I be able to turn it back on just by pressing the power button and having it still just function normally? Or would I need to open the lid to boot it back up, having to manually choose the "do nothing" option each time I turn it on? I really just want to avoid having to deal with the screen at all, and if I can find a way to use it while keeping the lid closed at all times, that'd be ideal for now.

Thanks for any advice in advance.