Thank you for using our forms. Sorry to hear you are having this issue with the cabling. If you are getting a green screen when using HDMI cables, it appears that your cable box is giving off HDCP, which is a form of copyright protection coming from the cable box. The only fix in this case would be to use component (for HD) or composite (for SD) cables. These two types of cables do not have the copyright protection in them. If your cable box does not have these types of connections, you may want to contact your cable provider to see about getting a cable box that has those connections. The article below will give you a bit more information.
Hope this helps,
The Sling Moderation Team