Xbox 230 slim E yellow light on my power brick. im a noob

ok guys.. so for collector´s purposes and a very good deal in amazon, i finally snatched an xbox 360. The newest version that looks very similar to xbox one.

Anyway, i NOTICED the other day that even with my xbox turned OFF, the HUGE power brick has a yellow led that stays on, I think it yellow or orange. It is STEADY, not blinking. Once I turn the xbox on, that yellow lights turns green.

Sorry to ask this silly question, but why does it do that?

It's probably just a standby light to let you know it's getting power. It's been a long time since I had a 360, but I believe my original model had the same.

Both true. It's normal.

Yep. Standby power light. If it bothers you you can always unplug it.

Thanks guys