What does the half moon symbol mean on my printer

Are you sure the maple leaf isn't a snowflake?? The snowflake means cooling mode. The half moon means night time schedule and the waves mean the fan is on. The little flame indicates heating mode.

It's to wake it up using the key on the keyboard featuring a half-moon on it.

These Keys are multimedia and internet hotkeys. The House would take you to your home page in your default web browser, the half moon is a sleep button, the music notes will open up (by default) your My Music folder.

Night symbol half moon and day symbol sun

The half moon usually means the computer is in SLEEP MODE. Normally, pressing the spacebar will wake the computer up but I have noticed that sometimes, the computer can get "stuck" in sleep mode. If that is the case, you can hold the power button down (until the power turns off and the moon disappears). Wait a few seconds then hit the power button again to turn the laptop back on.

You need to hold down the Indiglo button for 4 seconds. The half moon means that night mode is activated, and it will tuirn itself off in 8 hours (which I'm sure you know by know, seeing how it's been 5 years).
http://www.sportswatchinformant.com/timex-ironman-watch-night-mode-feature/

can u try what i gudie before