What you need to do is sign onto you Harmony software.
Up at the top of your software is a "Downloads" Button.
Click there.
What you going to do next is place your remote into safemode.
Pop the battery out of the remote.
Hold down the Off button at the top of your remote.
While holding it down put the battery back in.
Continue to hold the button down till it says Safe mode.
Since your screen is probably STILL blank at this time... wait till you see the activity light flash.
Then take you finger off of the off button.
Now click on firmware and go through that.
Next just update normally.
If your screen is STILL blank contact Logitechs warranty dept.
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My h890 has a blank screen as well
Logitech had me go through the same steps but instead of putting the battery back in they had me plug in the USB cable. Something tells me this is not a firmware issue.
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