ComputerNot Turning On | Test a SMPS/Power Supply Condition Dead or Good | RJ Solution |Disclaimer. Any electronics or electrical repair come with associate Myfirst suggestion is to replace the motherboard battery (see this Wikipedia article ). Those batteries CR2016 usually are cheap, and easy to replace. For the time being, in order to accelerate the discharge, you may want to try to remove the power cable, and, then, press the button ON of the computer. Share. Improve this answer. Checkthat the computer is connected to power and is turned on. Make sure that your keyboard and mouse are plugged in. Check that the monitor (screen) is plugged in using a display cable. Ensure that the monitor is connected to power and is turned on. Press the power button to turn the computer on. Placethe motherboard outside the case on a piece of cardboard Install the CPU/heatsink, memory, and video card. There's no need for a hard drive at this point. See if the board posts at all Inthis case, the Corsair 750i PSU will draw 750 watts of power. So, if you have other additional sources of power draw going on in the room, it will just add to the overall pull of current on that particular circuit breaker. Try turning off all other items in the room. DadouXIII. 1. Its actually a Mac Mini 2011 i5 2.3GHz she used the wrong power cord on. The day before the computer was working. Then the next day after she plugged it in it stopped working. Meaning, the computer did not start up when she used the incorrect power cord. We tried the correct power cord, but nothing, no start up. 18 189. 304. Posted: Apr 8, 2017. Options. Try this first . Unplug the computer then hold the power button down for 60 seconds then release and wait another 30 seconds then hold the power button again for 60 seconds .Now plug in the computer and try to start it . If you have no joy then you need to replace your power supply . JLl5k2.

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