My mts Motorola vip1216 cable box is responding extremely slow to any and all remote signals. Sometimes takes 2-3 seconds before it catches up. I have replaced batteries to no avail. Any known issues like this before? It seems to be all commands, doesn't matter if it's channel up or down, or guide, or enter, all seem to be very delayed at times. Frustrating thing is that it's not consistent so I often press buttons either too much or not enough. Any tips are much appreciated.