回答“Why is my Chromebook not starting”I think you might need an Operating system Reset here. Are you able to get into a restore mode for your operating system from the bootup options?
回答“Why is there no sound coming from my laptop?”It can be something to do with your sound drivers or the sound controllers. Why don't you try uninstalling those drivers and reinstalling and also check the audio settings and play with the devices selected in there.
回答“Which asus laptop model should I buy with a medium bugdet”mmm I was looking for the same actually and going through some comparison lists helped actually. E 15 is usually thought to be the better option in that mid to low range. But you can also try looking into different price range options tbh, like https://www.noflufftech.com/best-gaming-laptop-under-500/ and https://www.noflufftech.com/best-gaming-laptop-under-1000/ The Asus ROG GL552 Also looks like a decent option tbh and I find the specs to be quite fitting with what I would want personally being a gamer.