The power block
The power block's role is to power the different parts and subsystems within the system. It is of the utmost importance that the power section is approached by taking a lot of precautions and using protection. Some of the systems you will test will expose dangerous voltages or components. No test is important enough that you take the risk of maiming or killing yourself. Living to be able to do more tests and to get back to your family safe and sound is the most important part of your job as a hardware penetration tester.
The power block from a pentesting point of view
From a pentesting point of view, studying the power block will allow you to identify the different voltage levels used within the system. Do not assume that everything happens in one physical space; in modern systems, it is very common to have power rails distribute power across the system with higher voltage, more powerful electricity sources, and local regulation that is physically near the...