Unless the component is fixed externally replacing replacing broken internal compenets without hassel is almost impossible and needs to be done by a professional. You may already know this if you had tried to replace your low end GPU with a better one or have wanted to fix more RAM. Some laptops have this ability which allow you to replace certain componts without having to breakapart the laptop but for others you should know that after your laptop get dissasembled chances of it working again without new problems is slim. So you should learn to take care of your laptop better so that it may serve you longer.

Here are some of the stuff you need to lookout for,

1. Reduce the exposure to dust to a extreme minium. Dust can block your laptop's ventialation ducts and cause it to overheating which will lead to component faliures. Try covering the ducts with a thin tissuse paper while using and when not in use you must definately store it away in its case. Try to get it cleaned by a professional once a year at least.

2.Try to minimize usage in very warm or damp surroundings and never leave it inside a roasting vehicle. Also try to use a cooling pad if your in a very warm area.

3.Never keep the laptop continuously charging or always plugged in after it is fully charged. Remove the battery if your going to continue using it pluged in. 

4.Defrag hard drive regularly and remove unwanted programs that clog your resources. This will help reduce the batter drainage. 

5.Never use it on bed or a similar soft surface where the air ducts will get blocked. Dust from your bed might get sucked in as well. Always try to use it on a flat surface.