There may be no visible external damage.
What you are experiencing however is symptomatic of internal hardware damage.
This could be a bad tcon board, main board, or damage to the actual panel.
Typically if the boards are at fault you'd have weird lines or patterns on the screen. A complete loss of color could indicate something wrong internally in the panel layers, which would be consistent with physical trauma from being transported improperly.
There is one step you can take here, both as a possible fix, as well as a diagnostic evaluation:
1) Unplug the power cord from the outlet
2) Wait at least 1 hour (60+ Minutes)
3) Press and hold the power button (on the set, not the remote) for 60 seconds
4) Keep holding power button while plugging back in, and for another 60 seconds after. When plugging back in, go directly to the wall outlet, bypassing any power strips or surge protectors.
If this reset process does not work, it would unfortunately confirm an internal hardware failure.
This is something that would require repairs to correct.