Imac 24" No sound all of a sudden

[snowmaan]

Tried about everything
Made no real software changes, just found my speakers don't work at the moment

- No program has sound working (itunes, quicktime, etc)
- Even pushing the volume up on the keyboard omits no sound anymore
- Headphones plugged into the earphone jack also don't work

Whilst it sounds like the sound card / motherboard etc, our 3 yo son spends loads of time watching cartoons on youtube, so I'm guessing he has pressed a combination of buttons somehow to disable the sound

Anyway, appreciate any help

It's a iMac 24"
4GB
Snow Leopard OS

Thanks!

 

[simsaladimbamba]

Have you taken a look at System Preferences > Sound >> Output to see, what is listed there?
When you change the volume via the keyboard or the Menu Bar item, can you actually change the volume or is there a graphic showing like the one below showing:

Btw, is there a red light coming out of the audio out port? If so, plug and unplug a 3.5mm plug (headphones) repeatedly until the light is gone.

 

[snowmaan]

You are awesome!
Thanks mate, it was the output option, was 2ch speaker for some reason

Obviously our son


Thanks simsaladimbamba!

 

[simsaladimbamba]

You are awesome!
Thanks mate, it was the output option, was 2ch speaker for some reason

Obviously our son


Thanks simsaladimbamba!

No problem. Greetings to that orange near those pesky blue mountains.

 

[jahbuzzz]

Good Lord!! Worked for me too! God bless this thread! I have a 2 year old too - How ever did she do it!