I built a computer ( ga-ep35-ds3l; intel q6600; 650 watt power supply; 1tb hdd; radeon hd 5450 vid card; and 8 (4x2gb) 667 ram ). I turn it on everything comes on like the mobo lights and it make a long almost distorted beep and a sec later the led goes off on the mobo but the fans are all still running, i need help i have no idea what it could be, and there is never any video displayed on the monitor
Try just using one stick of RAM if it boots you may have a bad stick. I would try each one individually. Also if you have a motherboard with onboard graphics and you are using a discrete card try removing it and use the onboard.
That's what I did first but there is no error for just one beep its one one beep followed by more beeps. I think that it might be the mobo, I removed the bid card and same thing happened, I removed all except one and it still persists so I used another psu and it still continued so it's down to CPU or mobo