I've been trying to adapt the design for power distribution layed out in this raspi cluster design.
While looking through the researcher's design, I couldn't find any use for jumpers 2 and 3, espcially since the photographs seem to show no connections on jumpers 2 and 3. I opted to remove those jumpers and use only a single LED and ended up with this design:
The design successfully powered two raspberry pis connected to a standard PSU, salvaged from an old PC (from around 2001~2002), that provides 5V at up to 42 A. However, when connecting three raspberry pis, the boards were powered momentarily (board LEDs flicked on for a second) then shutoff. When checking the fuses of the power board, 2 out of 3 of the fuses in the configuration blew out (all except for the fuse in the center board). I'm a newbie to the electronics configurations and I was wondering if I left something critical out of the design or if something else is going wrong here.