Computer Powers On, Then Instantly Off Tags: Asus Light Computer Motherboards Last response: October 30, 2010 1:57 PM in Motherboards Share vstrelok October 29, 2010 1:41:13 AM Hello, When the computer is powered on, the lights/fans turn on for about half a second, then turn off. What could be the problem? Thank you, More about : computer powers instantly davcon a b Ĉ ASUS a c 117 V Motherboard October 29, 2010 2:36:16 AM Sounds like a faulty psu. I would test it. http://www.youtube.com/watch?v=5FWXgQSokF4 m 0 l suat a b Ĉ ASUS a b V Motherboard October 30, 2010 1:57:47 PM Check if CPU power is connected (4-pin/8-pin 12V ATX power). Check if CPU is mounted properly in its socket on the motherboard. m 0 l Can't find your answer ? Ask ! Publish Read discussions in other Motherboards categories BIOS Boot Chipsets ASRock Asus Chaintech DFI Elitegroup FIC Foxconn Gigabyte Intel MSI-Microstar !