Great post Isabelle. I noticed some key points that you have mentioned that i have forgot to tag that are also important to know and one of them is documenting your investigation and your findings. I think that this is a good practice to implement if you are to go into hardware technician. Its a good habit to have but also some if not most tend to have the need to document your findings. Also, knowing how old your equipment is or your hardware is vital as well indicating whether if you need to update your parts to ensure everything is running smoothly.