Hello!
I had exactly the same issue as
svidgen. The PSU is exactly the same, from the
Parallella Accessories Kit. After disassembling the PSU, the issue was clear: the two filter capacitors had
bulged top and bottom.
- PSU
- pic1.jpg (114.32 KiB) Viewed 21356 times
The bulged capacitors:
- Capacitors bulged top
- pic2.jpg (23.6 KiB) Viewed 21356 times
- Capacitors bulged bottom
- pic3.jpg (21.91 KiB) Viewed 21356 times
Replacing those two 1000uF 16V capacitors solved the issue. The Parallella board works well with it.
It is very weird that a brand new PSU has bulged capacitors. Capacitors usually do not bulge just sitting on a shelf. I have serious doubt about the manufacturing and testing process of this PSU.
Fortunately it is easy to fix.