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.

[santo_13]

Long story short, IMHO it may not be worth your time to try to repair the board, either send it for repair or get a new one.

Yeah, those are some expensive learning. So, the schematics are NI confidential and not available outside. You would have to approach this board repair as a black box, trying to figure out the traces and power supply components, testing them one by one and fixing them. All of this makes sense only if the FPGA is still alive.

About what can be fried, it could range from as simple as a bunch of LDOs, diodes, traces and worst-case FPGA itself. When you say you shorted the DC supply pins, you shorted on the RIO board? means a lot of current passed through a very small trace? - if this is the case, it would be case of a burnt trace and you can fix it by soldering wires.

I would start checking the supply pins of the FPGA to check for short to GND then onboard regulators, if you're confident, remove the burnt components in the power supply path and attempt to power up the FPGA from an external supply (this may be tricky, some FPGAs require a very specific power sequencing).