The premise is simple...you should be able to fix/repair things yourself, if willing or needed. They have a lot of guides on how to fix a ton of things. You can even add your own guides, if inclined.
https://www.ifixit.com/
They also have "Fix Kits" for specific devices that includes the equipment, parts and tools you'll need. ;)
https://www.ifixit.com/Kits
Fixing things is a good skill to have. Tips and tricks are helpful. ;D
That site is very helpful indeed. :happy: