If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Firmware (Software) update procedure of many popular brand TVs and other devices are given in detail.
SOURCE: I have a Logitech 670 Harmony Remote control. When
Do a firmware update again in safemode. Press and hold the "off" button, and then plug it into the computer, and continue with the firmware update. If this doesn't work, I'd call technical support.
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