which features can I use to model a LCD monitor. can I use the loft feature to model the main body? How can I make the angles on the edges of the body of the monitor?
You must do all SW tutorial exercises to effectively learn the software.
Answered with a tutorial: https://grabcad.com/tutorials/how-to-model-a-lcd-monitor-on-solidworks
I worked 2 years in Television R&D section in Walton Micro-Tech Corporation, a television manufacturing company.
My works included design and research on physical body and it's parts of a full television. I worked in SolidWorks. Now own my own company www.validgeometry.com
Honestly, if you want to model a television perfectly, you have to know many things in SolidWorks and many things about its manufacturing.
So, you should first practice SolidWorks more and more then go for modeling a true television body. Well wishing for you.