I've been using a Helios4 for nearly 2 years now and it's been fantastic.  A couple days ago, it stopped working though.  The serial console revealed a boot loop at "U-Boot SPL" and only showing the disks, but never attempting to boot the OS.  I did some forum searching and discovered the PSU could be the issue.  Using a multimeter, I tested the PSU pins and I get the following (see diagram): PIN 1: +2.66V (fluctuates between 2.64-2.66) PIN 2: +2.66V (fluctuates between 2.64-2.66) PI