Step1: Ensure that both the power supply and the motherboard lights are flashing green, not solid or off. Step 2: While the power is on, disconnect the power supply from the motherboard. This connection is the largest of the connections and should be listed as the 'P1' or 'Primary' power connection. Step 3: Wait until the green light on the Apoor memory in a computer might prevent it from turning on. If the issue continues, you should check the RAM. If the Motherboard lights are on yet the computer is not starting, you need to reseat the RAM and try again. If your computer has not started yet, it is necessary to combine the RAM and CPU into a single slot. CheckYour Plugs. First, you must completely remove any of the connections from the PSU. The chance that something wasn't plugged in correctly is high if the unit won't turn on, especially if you're working on a new build. Remove your PSU from the computer and unplug all the connections it uses. 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 .

computer not turning on power supply ok