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* ''The console will not power on.''
** See the [[#Power Supply|Power Supply]] section.
==Power Supply==
Problems with the power supply typically result in the console not being able to turn on, although sometimes only certain components are affected (for instance, a CD drive). Other problems that may be related to a faulty power supply are self-resets or an image with a lot of interference. To diagnose a power supply, you will absolutely need a multimeter.
===The console does not receive power.===
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. Usually 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.
