Paradox MG5050 Trouble

[FACR]

Hi All, I recently cancelled my monitoring with my security company, they collected their radio but now my panel shows a constant "TBL (4) fail to com1. How can I reset this?

 

[Sharan]

 

[FACR]

Thanks Sharan, have tried this already, unfortunately "TBL" is still displayed on the keypad.