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<blockquote data-quote="eight_ball" data-source="post: 143938" data-attributes="member: 49444">The problem ended up being the CATV cable being plugged into the back of the TV. To make a long and complicated story short - CATV usually uses a floating ground and the TV and PC uses a solid ground. Having the two different grounds plugged into the TV creates a ground loop - thus creating &quot;Video Hum&quot; - which are the slow moving horizontal lines on the TV. The solution(s):unplug the CATV&nbsp; cable from the TV (more of a temporary solution)orget a ground loop isolator (isolation transformer) for the CATV cableorget a power bar that has a CATV cable grounding feature and make sure your TV is plugged into it as well.&nbsp; Hope that saves some possible frustration for anybody who has or will have this problem! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin&nbsp; &nbsp; :D" loading="lazy" data-shortname=":D" /> More reading on the subject:<a href="http://en.wikipedia.org/wiki/Ground_loop_%28electricity%29" target="_blank">Wikipedia: Ground Loops</a><a href="http://en.wikipedia.org/wiki/Isolation_transformer" target="_blank">Wikipedia: Isolation Transformers</a><a href="http://apc.com/products/family/index.cfm?id=176" target="_blank">A power bar with CATV surge protection</a></blockquote>

[QUOTE="eight_ball, post: 143938, member: 49444"] The problem ended up being the CATV cable being plugged into the back of the TV. To make a long and complicated story short - CATV usually uses a floating ground and the TV and PC uses a solid ground. Having the two different grounds plugged into the TV creates a ground loop - thus creating "Video Hum" - which are the slow moving horizontal lines on the TV. The solution(s): unplug the CATV cable from the TV (more of a temporary solution) or get a ground loop isolator (isolation transformer) for the CATV cable or get a power bar that has a CATV cable grounding feature and make sure your TV is plugged into it as well. Hope that saves some possible frustration for anybody who has or will have this problem! :D More reading on the subject: [URL="http://en.wikipedia.org/wiki/Ground_loop_%28electricity%29"]Wikipedia: Ground Loops[/URL] [URL="http://en.wikipedia.org/wiki/Isolation_transformer"]Wikipedia: Isolation Transformers[/URL] [URL="http://apc.com/products/family/index.cfm?id=176"]A power bar with CATV surge protection[/URL] [/QUOTE]

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