When i connect my MacBook Pro to my TV via belkin HDMI my TV goes blank for several seconds and continues to do so. Any ideas how to stop this ?

Hello Flash46,

It sounds like you are unable to use your TV as an external monitor over HDMI due to some unexpected behaviour. I would use these troubleshooting from the following article to help troubleshoot this issue:

1. Confirm display adapters are fully seated in their respective connections and that they are supported models and for the computer and display. Refer to these articles to assist you with adapter compatibility and further configuration information:
   • Monitor and Display Adapter Table
   • About Mini DisplayPort to HDMI adapters
   • Apple Mini DisplayPort adapters: Frequently asked questions (FAQ)
   • Thunderbolt ports and displays: Frequently asked questions (FAQ)
2. Remove all display cable extenders, KVM switches, or other like devices and retest to determine if the issue is resolved.
3. Try unplugging the video adapter or cable and then plug it back in.
4. If more than one video adapter is in use (or "daisy-chained"), troubleshoot by using only one adapter.

   Example: A mini DisplayPort to DVI adapter connected to a DVI to HDMI adapter is an unsupported configuration because there is a series of adapters in use.

5. If available, try using a different display and or adapter (or use a different connector by using DVI instead of VGA, for instance).

Reset the system
You can reset the Mac's parameter RAM and SMC.Reset the resolutionStart by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:

1. Start up in Safe Mode.
2. From the Apple () menu, choose System Preferences.
3. Choose Displaysfrom the View menu to open the preferences pane.
4. Select any resolution and refresh rate that your display supports.
5. Restart your computer.

From: Apple computers: Troubleshooting issues with video on internal or external displays

http://support.apple.com/kb/ht1573

Thank you for using Apple Support Communities.

All the very best,

Sterling