new remote lost function

[Marley]

This new remote was working for 3 months now My 3900 remote dont work have two of kb one and both dont work on boxs .I tried Batteries and changed usb ones too did factory reset to and no go .Can anyone tell me how can i get this to work again only thing the remote will do is turn it on and off thats it .Now are there any setting ? the older remote works on box but cant take it from wife just not kb one will work it did for 3 months then lost function now what gives was it update that screwed this up ? How can i get this remote to work again or my box any info on how to reset remote on box or anything i can try to get box to let function work on remote again just on and off that it and hot key kodi but wont let me do anything after that no up or down or anything