After checking the issue, it seems this is a general system related issue. As this forum focuses on Windows SteadyState specific issues, this inquiry would best be posted to Windows XP or Windows Vista forum:
http://social.technet.microsoft.com/Forums/en-US/category/windowsxpitpro
http://social.technet.microsoft.com/Forums/en-US/category/windowsvistaitpro
The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the newsgroups regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding.
Also, for your information, we usually use VGA-VGA or DVI-HDMI to connect to a TV. You can check if you have those ports.
Sean Zhu - MSFT