Quick things to Check

• Check computer settings to verify that the computer sees the second screen output.
• Make sure that the HDMI switcher is set to the Desktop PC.
• Check the Videohub to make sure Output 14 is set to Input 10.
• Make sure all TV's are on HDMI 1.

Not so quick things to check.

If the above does not work,

• If no TV's work,
  • Troubleshoot HDMI to SDI adapter
  • Troubleshoot SDI Distro
• If some TV's work,
  • Troubleshoot the SDI to HDMI adapter behind each TV