Check and make sure the monitor is good by using another computer on that monitor. If that is good then the cable is good. Are you getting any video display at all? Does it start and then lose signal or no signal at all? Is there on board video or a video card installed or both? If there is both have you tried both vga connections? If there is a video card installed make sure that it has not come loose and is fully seated. Does the computer have lights when it boots up....Hard drive activity ect?
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