Michael, can you take a close-up of one of those blue capacitors (the big cylinders) on the amp board? In your second photo it looks like there is some black stuff where it meets the PCB. Rotel, or more likely their 3rd party manufacturer, used a corrosive glue under these capacitors which will leech out over time and start to damage the parts around them. The blown fuse might suggest that some corrective action is required.
Thanks for looking Andrew. Here are a few more pics. All the blue capacitors appear to have some black substance around the base. Not sure if I'd say it was leaching though. More like, just glue??
