computer won't post
i've recently built a new computer,all has been fine untill this morning
i booted it up and all it does is, fans spin for a second then stop and just keeps on repeating itself.
the leds on the board light up and then go off again,
the board is a gigabyte ga-ex58-ud3r.
i've had a bit of a play and when i disconnect the atx 12v cable the fans spin but there is still no beep from motherboard.