DC power supply shorted - NI sbrio FPGA board does not power up - any leads to debug NI FPGA board?

[aym1]

I accidentally shorted the DC power supply pins on the sbRIO 9612 board and my DC power supply had a very large current limit. Now, the FPGA board does not power up. To see if the fuse blew up, I replaced the fuse with a wire to see if the board works now. It did not. Which means, something other than the fuse is not working as well. What could I have possibly fried in NI sbRIO FPGA board when I shorted power terminals? It is a 1000$ board and the service repair quotes 500$. I want to try to fix it by myself, if I can. Does any one have a schematic of NI sbRIO9612 FPGA board or any suggestions on how to proceed with debugging this board.

[Dharani.R]

Hi, Few troubleshooting steps from myside.

• There are multiple fuses on the sbRIO. Make sure all the fuses are functional. I found this in user manual - "If more than 3 A flows through the common (–) pin on the J3 power connector, components start to fuse open"
• Make sure sbRIO does not draw more current when it's connected to power supply. If it's drawing more than ~50 to 100mA in idle condition. If it's drawing more than this, I am sure some internal diodes or other components are damaged. It will require repair.
• Check the Posistor (PRG18BB330MS1RB from Murata).