The content of the laptop can be put on the desktop screen, and the content of a single desktop cannot be put on the laptop. The method is to directly connect the cable connecting the desktop host to the corresponding interface of the laptop.
No, because the laptop is a whole machine, and there is only one switch on the whole machine. You should also notice that when you open it, all the internal working circuits are connected at the same time. You can't just turn on the LCD as you said, so that other parts will not act. And you said that your laptop is relatively old. I think the effect will not work. I suggest you buy oneOne LCD monitor is not very expensive now. You can buy a very good monitor for about 500 yuan. It's good to look good
