I have a sweet, old (but still working well) PowerPC G3 but now I find that cds/dvds aren't working. You put in any cd/dvd into the tray, the tray closes and...absolutely nothing... no whirring or humming noise, no recognition that it has anything - the tray still goes in and out though. Does this mean a trip to the tech-y? I thought it might have been because I had too many peripherals but I turned them off and restarted but still nothing. Thanks if you can help!