I'm getting some crackling sound out of my speakers after inadvertently applying slight pressure on the power supply wire. I found the plug had partially come out of the controller. I pushed it back in and tested, but there is still a crackling sound. I think the problem is the power supply needs to be replaced. What do you think could be the problem? I want to replace the power supply as a first attempt to fix the problem. Attached is a pic of a power supply that looks more like a laptop power supply. Description shows NI-23975 which I believe is the NI power supply part number. Would this work? Thanks.