Replacing the fuse, The unit may be disconnected from its ac power sou, If connected to an rps, the unit may be disconnect – 3Com 100 TX User Manual
Page 23: The ac power source may have failed, 1 locate the ac receptacle on the hub’s rear panel, 2 disconnect the ac power cord, 3 using a small screwdriver, carefully pry open an, Figure2-7 opening the fuse-holder in the ac recep, Replacing the fuse 2-9
