Now I've had some time, and one of the first things I checked was the internal fuse. It was blown, so I went to get a replacement. It's a standard 5x20mm glass fuse. Unfortunately, the markings are non-standard.
The markings are "T200E250V", and a "W" with a small circle above the center of the W, and both inside a circle. On the other end, we have "VDE", a European certification, in a triangle, the "RU" Underwriter's Lab recognized component mark, and a small "US".
I have had zero luck finding out what "T200E" means. I am not exactly inexperienced with electronics, I spoke to a friend who has taken a Master's in EE, and works with circuits that use this type of fuse every day, and talked to an tech support engineer at a fuse company. The consensus is that "250V" means exactly what you might think, it's a 250V rated fuse. The "T200E" is gobbledygook. The best guess is that "T" is time delay, and "200" is 200mA. No one has a clue what the E is for. Or, "T200E" may be a part number.
If you know what it means, if you happen to have a Fubar II, that you're willing to pop the back off of and look, or if you have other means of finding out what the correct fuse rating is, please let me know.
I have been unsuccessful at contacting audiophileproducts.com, the NA distributor. I tried calling all the dealers listed on their site, but was unable to get any info from them.
I recently sent an e-mail to firstname.lastname@example.org, and have not heard back from them as yet.
My last resort is to desolder the fuse holder on the board, as I believe the rating is printed on the board. Quite effectively covered by the fuseholder, unfortunately.
Many thanks to anyone who can help.