Hm, I disagree with one point: Don't display ways to fix the problem only. Of course, if the voltage is low, then the power cable is the most probable source of

Hm, I disagree with one point: Don't display ways to fix the problem only. Of course, if the voltage is low, then the power cable is the most probable source of issues, but what happens if it is not? In that case, I have to reconsider why I need to check the power cable. If I see "Voltage low, check the power cable", you serve both the tech-savy and the old grandma. I can check the power cable, see it is ok and go ahead to search for other possible power issues while the casual user is also fine.