sorry about delay to your response . samsungHDTV adapter.
I used HDMI port on TV
Please press and hold the Power button down for 20 seconds. Press Power button again to turn on your tablet if it did not reboot.
Then connect the adapter to your Galaxy Tab and see if you can get display on your TV. Thank you!
Go to Settings
Select Apps-> ALL
Select Media Storage and Clear Data
Go back to ALL and select Google Services Framework
Select Clear Data.
Turn your device off and back on.
Try to connect to your TV and see if it will display. Thank you!
You might want to reset your Galaxy Tab to factory settings. This will wiped your data out so please back up your data to microSD card or connect to your computer and transfer them out. Then proceed as following:
-Go to Settings
-Select Factory data reset
-Select Reset tablet
-Select Erase everything
-Your tablet will reset which will take about 3-5 minutes. Set it up again and test your TV issue. Thank you.
IMPORTANT: PLEASE ONLY RATE MY ANSWER WHEN YOU ARE DONE OR 100% SATISFIED. And remember that YOU ARE RATING MY HELP/SERVICE.
If my answer did not work or you have any questions or concerns, DO NOT RATE YET and please reply to me via the Reply To Expert or Continue Conversation button. Reply with your status/update and I will be happy to continue further.