Display off- any benefit?

My HK3770 has the function also;
Along with my Tortuga LDR300,
It allows one to set the timeout on the display.
I haven't heard even the slightest audio effect either way. 
It's a convenience option I guess.
Some think it lessons any chance of noise from the display getting into the audio.

No audio benefit from clicking off the LED display.

Ditto if the display LED bulb(s) burned out and needed to be replaced.

That feature is non-audio visual fluff.

No discernible difference here either, when using my cdp (a Magnat tube) or my big cdp (Absolute, ideon audio) or both off. Then I discovered that the Absolute has a totally separate circuit for the display. The cdp, however, doesn’t... so no big deal!

I have not been able to detect a difference but perhaps its component built dependent?