Hi - I have a LG UH617V 49 Inch tv. Until today the magic remote was working fine. Now the magic remote cursor, back button, ok button along with the up, left, right, down keys are not working.

I am trying to deregister it with the mentioned method of holding back and recent (home) button for five seconds and then pressing ok but it doesnt work. Rather than flashing three times the power button light stays firm. Is there any troubleshoot option that I am missing? I have even reset my tv but unfortunately no use.

My Remote Model is AN-MR650