This is really strange. No problems with this remote for years. All of a sudden, the screen is dark and no sound. I've tried replacing batteries with no change. I've tried using removing a battery and replacing it while hitting the on and mute keys. Yesterday that worked but I was unable to do anything else. Today, just once when I tried a different set of new batteries, everything worked with text and sound. However, when I turned the remote off and tied to turn it back on, there was no response. And today, I can't get it to go into the boot loader. Any suggestions, or is this thing just dead?

Thanks