Since today our iMac has suddenly stopped booting..
It's been a while since we used the keyboard on it due the dog eating through the USB cord.. (been operating it using VNC)
Today I fixed the USB cable successfully, keyboard worked fine.., but since the mouse was ALSO eaten (damn dog

), I decided to plug in an optical USB mouse to the keyboard.., then things went bad...
It jumped out of powersave mode with a garbled screen, no sweat, let's reboot it..
And that was the last we saw of the iMac..
When we turn it on now, it just plays the chimes theme, and falls silent, power LED stays orange, screen doesn't turn on..
We've reset the NVRAM using the command-option-p-r (that works, so the USB port is still in working order), to no avail..
We replaced the RAM with another stick.., no avail..
I tried hitting the CUDA switch.., still nutn..
I even tried command-option-o-f and then typing blindly:
reset-nvram
reset-all
mac-boot
Nothing happens..
Also tried disconnecting everything non-vital, disconnected all USB devices, disconnected the HD and CD-Rom, even the videoconnector.., but it still doesn't do anything more then playing the chimes thing when we start it up..
Anyone has any clue what could be broken ? (my first guess would be that I fried the main board somehow)
Unfortunately I don't have a battery tester here to test the onboard battery, should an iMac boot without the battery attached or when it's empty ?