I have an old Gateway desktop computer with a Gateway flat screen monitor. The display on the monitor started "shaking or quivering". I thought that the monior was bad so I bought a new LED monitor and connected it using the new cable that came with it. The display is the same. What can I do to fix this? I am not very tech oriented so please make the suggestion very simple to understand.
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it could be the graphic part on the old gateway system need name and model