Hi and thank you for using justanswer.
While i could not find the manual for your tv and therefor cannot be specific about your menu, i know that what you have is "closed caption" in text mode.
So perhaps this info may help you.
Look on your remote control for a button called CC or CAPtion and press it, then you should be able to turn it OFF
Otherwise you will find it in your tv`s menu under "closed caption", you will see that there are different type of caption, usually the type being used is CC1.But in that same menu you will have the opyion to turn it OFF
option to turn it OFF (sorry for the typo`s)
As you appear to be offline i will switch to standard Q&A mode.
We are now in Q&A mode.
I left you an answer in the chat window.
Hope this help and let me know if you have any questions.