Solve : Desktops/monitor issues?

1.	Solve : Desktops/monitor issues?
Answer» So recently i found two of my old desktops and i tried hooking up a MONITOR to them. They both turned on great; spinning and whirling of fans and hard DRIVES. When i tried to hook up one desktop, the screen didn't turn on, it simply changed the monitors button from green to orange. The other worked great. So i tried to MOVE the hard drive from the FIRST (not working) desktop to the second. shortly after, the second computer no longer can hook up to a monitor either. Is this just a coincidence or did i set off a chain of failing desktops? Check to see if there is more than one video connection on the computer. Some motherboards came with built in video and people replace with a video card you may have inadvertently plugged it into the wrong one. Check the pins on the connector make sure they are not bent, missing or the cable is loose. Have you tried a different monitor, when the computer is disconnected from the monitor does it show no signal found?

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