Thesafe way to unplug your desktop computer is to shut down Windows properly until the machine turns itself off, at which point you can pull the plug. If you have a laptop, you can unplug at any time since the laptop battery will continue to power the machine and a low-battery situation will cause it to turn itself off. Itried turning it on and only the case fans run. I have replaced the PSU, the motherboard and the PSU but it's still not turning on. I've tried a new graphics card as well. Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're
1 Check the Power Supply Unit & Power Switch. The Power Supply Unit (PSU) supplies power to the motherboard and all the other components in the computer. So first, make sure the PSU is plugged in safely. Also, check the switch at the back of the Power Supply Unit to ensure it is on. Now double-check the Power switch to ensure that it is working.
2 Unplug your computer and remove the battery. This is a sort of first aid for your computer. Simply unplug from any power sources, then remove your computer's battery (or laptop). After about five minutes or so, return the battery back and hold down the power button for about 10 seconds (power still unplugged). Thecause of your iOS/Windows computer's failure to come on even with a perfectly working power source could be an issue with your iOS/Windows computer power cord. Computer Not Turning On The Power SupplyYour iOS/Windows computer power cord wires might be loose or cut from within the casing, causing hindrance to the free flow of electric
PCnot turning on. When power is pressed it flashes an fans move for less than a second then turns off. got a new power supply and sent in my motherboard to gigabyte and just got a refurbished one back. Removed a few devices and it started ok although had to reconnect the power to get it going. Replaced the PSU anw everything is fine. I
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    • computer not turning on power supply ok