I had a very similar problem where my dual monitors were responding with blacked-out screens on boot-up and/or wake from Sleep. To not bore you with all the details this is what I found:
In the Device Manager I noticed several entries for Infrared (IR) devices. The Human Interface Devices had several; the System Devices had several; the Mice and Other Pointing Devices had two; the Keyboards had two; and the Universal Serial Bus Controllers had several. My system has no IR devices attached and I wondered if the system was "confused" with all of these "ghost devices and
drivers" remaining on the system. I decided to "Disable" everything in the Device Manager that was associated with an IR device. Once they were disabled I ran "Scan for hardware changes" and upon completion all but two of the IR related entries evaporated! The 2 remaining devices, one in System Devices and one the Universal Serial Bus Controllers remains disabled while I further research as to whether it is okay to "Uninstall" these devices from the system...
This "fix"
seems to have corrected my problem although I am
still testing it! It may not work for you, but good luck!