Hi, My computer is powering up, but does not go through the POST checks. In addition, there is no signal to the monitor. I have changed cables to the monitor but still the same. There initially was regular beeps approximately 3 seconds long continually sounding, but after trying the cables, there is one long beep, then a short beep, then the computer powers down. I would be grateful for any advice on what the problem may be? I believe it may be the onboard graphics that has failed, could this happen? I was going to fit an AGP graphics card that I have spare to check it, but the mobo doesn't take it, only PCI & PCIe. The mobo is a Foxconn 945GZ7MC-KS2H. Thanks.