J1900N-D3V, 5 beeps on power-up

[rmappleby]

I've just received a new J1900-D3V board to upgrade my home server. I got it all wired up, and on power-on, there is a short "power on" beep, a pause while the drives spin up, but no output on the VGA ... and then 5 short beeps.

From http://bit.ly/1i7smxN that sounds like a CPU error.

Before I start though the whole process of RMA'ing the board, does anyone know of any problems with powering a J1900 off a PicoPSU? I'm using an early 120W version, built around a 20-pin ATX connector, similar to http://bit.ly/vyN2Gj. Mine only has two molex and a floppy power connector, so I'm using some extra adapters to provide me with connectors for 2 x SATA power connectors, 1 x P4 connector, and a single Molex connector to power my fans. The whole lot runs off a 102W AC-DC brick.

The system comprises the motherboard, 1 stick of RAM, 2 x 3.5" disks, and four 80mm fans (no graphics cards or anything) and I figure it should be drawing less power than my current VIA C7 system (which boots fine).

Thoughts?
Richard

[rmappleby]

Bah. I think I've realised what the problem is likely to be. I'm depending on the trick of plugging a 20 pin ATX supply into a 24 pin motherboard socket, and expecting it to work. It almost always used to, but I suspect this new motherboard requires all 24pins of the power connector to be connected. I'll pick up a 20 pin ATX supply to 24 pin motherboard adaptor tomorrow and check my theory out.

[dmdilks]

The 20 pin PSU should work. The 24 pins were made for dual CPU and it became a standard for all boards.

The CPU plugs were made from 4 pin to 8 pins were for the same reason. The 4 pin is 150w and the 8 pins is 300w.

http://www.playtool.com/pages/psuconnectors/connectors.html#eps8