Okay, the fuse nearest the docking connector is blown (Hugo also just now suggested checking those). What capacity replacement should I use?

The resistor pack for the LEDs is 560 ohm per leg. I've verified no shorts etc. on the installation (the parts are all listed on Brian's site at http://www.hulkster.net/empeg/buttons/ledhowto.php3).

I'll do the other measures, and look for a short on the line connected to the blown fuse, when I get back to the machine later tonight.

Thanks!