Changes

The first thing to do is confirm this is a problem with the power supply and not a "no picture" issue. Some consoles, like the [[Coleco Vision]], do not have a power LED or any other physical indication that the console is turned on without being connected to a display. IfUsually it is obvious when a console turns on, even if it's not working properly, because the display will change colors. However, some displays have a solid black screen as the default "no input" screen, and a malfunctioning console, when powered on, may also display a black screen, but if you pay attention you can easily spot the difference. CRT's will usually give a brief flash when the screen is initialized and the sound of the raster will change.