Hi Vince. It sounds to me like the LCD screen on the remote is blank or not displaying correctly. Is that right?
Sometimes there can be a corruption in the firmware of the remote that causes this to happen. If this is the case, updating the firmware usually fixes it. So, I am going to suggest that you start with that. Please do the following:
1- Remove the battery from the Harmony remote, hold the 'Off' button and insert the battery back in. The screen should display 'Safe Mode', or the backlight might flash.
2- Make sure you have version 7.7.0 of the Harmony software installed on your computer. You can download it at
http://logitech.com/myharmony.
3- Launch the software and log in to your account.
4- Click on 'Downloads' at the top of the screen.
5- Click 'Firmware' and wait while the firmware updates.
6- Update the remote.
After you have done this, please test the remote. If the remote is still not working, please let me know the following so that I can see if I can determine what's up.
1. Is there anything showing on the LCD screen?
2. Are any of the buttons on the remote having any effect on the devices?
3. Point the remote at a digital camera or cell phone cam, and press some buttons. Does the end of the remote light up, indicating that IR commands are being sent?