Guide shows "No info" only on wireless receiver

Recently, I had a pixelation and recording issue which a technician fixed at my subdivision's board.  I hadn't noticed until I recently tried to record a show using my wireless receiver that its Guide only shows "No info".  As a result, I can't select any series or shows using my wireless receiver.  I've read a solution that said to reboot the gateway, but I don't have any idea of the problem that person had was with a wireless receiver.  Any other suggestions before I reboot the gateway?

Update:  Don't know what is different, except moving the Wifi closer to the gateway, but the problem no longer exists on the wireless receiver.