I have 3 STBs the main box works well, but the 2 saecondary boxes have defective displays, 1 box is completely blank. The other has sporadic LEDs lit at various times. I can no longer see the channel and I can no longer see the time. This condition was gradual, about six months after I got fios the LEDs just started to disappear. I've contacted Verizon numerous times but their people don't seem to understand my problem and keep referring me to their on line troubleshooter that doesn't address this problem. I've even asked for replacement boxes. Can any one help me get my displays to work again?