my gateway computer will not boot up. The power light stays amber on the cpu, never goes green and the monitor light goes green long enough to display the scrolling message: check power cable or monitor cable,then it goes back to amber. The power supply fan comes on momentarily and stops. The other fans do not start and the harddrive doesn't seem to be spinning. The cd drive will not open. Cannot get to desktop at all. No beeps to mention. Someone please help!!!!! Thanks.....