Hi guys, Picked up a second MDD recently to add to my collection, and because it has the dual 1.42 processor so a nice lot quicker than my single 1.0 MDD. But I digress. It doesn't seem to output any audio at all. No start up chime from the internal (or external) speaker(s), when it boots into the OS it doesn't play any sounds either, no matter if the output is set to internal, external, etc. It recognises when something is plugged into the front and rear audio jacks, as well as the smaller 2.5mm jack for the Apple speakers (audio output changes accordingly depending on what's plugged in), and when nothing is plugged in externally it'll default itself to the internal speaker, but sound won't play out of any of them. This is with both a clean install of Tiger and Leopard. Under Leopard, it always shows the sound icon in the menu bar, but under tiger it disappears when nothing is plugged into any of the external jacks. Tried the usual PRAM reset using the keyboard shortcut and setting defaults / resetting NVRAM under open firmware, before and after clean OS X installs but still nothing. One thing I have noticed is occasionally when powering on the machine, instead of chiming it's as if the internal speaker gets power for a split second (no chime but kinda emits a noise like a speaker does when electricity goes to it), but other than that, nothing. Any ideas what it could be?