Hi, I just did a firmware upgrade on my Sharp LC-C5255U. All went smoothly, ending with the message ""System software was successfully updated. Remove the usb memory device." I pressed OK and removed the flash drive... now the problem. The message won't go away. No matter where I navigate in the menu, turn power off, unplug, etc., the message telling me the upgrade was successful pops back up and stays. Anyone hear of this before or have any suggestions? Thanks.