"Other platform displays were of the amber-hued variety"
I love me a good LED matrix. Amber is the best for most displays but I like a good tricolor also (each pixel red/yellow/green with combos of orange and chartreuse). Reminiscent of days gone by... eggcrate displays on "Wheel of Fortune"... my high school's roadside sign, 80 x 16 incandescent... and my parent's first printer, the Citizen MSP(?)-10 dot-matrix -- thanks to Broderbund's The Print Shop we gave that printer a full life and an early death.
So many LED full-color / full-video signage panels are cheap affairs that fail before they're even done being installed, and usually Windows is not the culprit. But a bork is still a bork and if your display don't work, you've wasted your capital, not to mention the ongoing cost to keep the thing powered up. (There IS an off switch -- it probably has its own circuit breaker. Don't turn it back on until it's fixed or the repair tech needs power to fix it. Oh, it's not broken but the previous owner/lessee of the building took the proprietary operating software with them when the biz failed, probably due to sinking the money into that sign? Go out, find the make, model, and serial, and call up the manufacturer. Get your own copy -- cheaper than the hardware, surely!)