the fuse in that power supply is either a 5x20mm cartridge fuse or a small brown round device that has some writing on it's flat top. you can check with an ohmmeter from the power cord prongs to the center two pins of the bridge rectifier to see if you have continuity, if you don't have continuity from one center pin of the rectifier to it's matching prong on the plug (one pin goes to one prong, the other pin goes to the other prong), the fuse is open. surge protectors don't always work the way they're expected to.... i hear it all the time "i had it plugged into a surge protector..." it doesn't matter.... lightning has traveled several miles through the sky... a 1/8" (4mm) piece of silicon isn't going to stop it. the fast rise time of a lightning pulse generates a large spike across the plates (similar to a ceramic capacitor) of the MOV before the silicon has a chance to conduct. a better method of protection would be to have gas tube protection across the MOVs. the gas tubes would respond a lot faster (nanoseconds compared to microseconds). still the best thing to do with thunderstorms in the area is to unplug anything that can be damaged by a nearby hit. unplugging your equipment is the ONLY thing that will protect from a direct hit as well, lightning often jumps power switches that are turned off.