Sorry this one took so long! You definitely should remove your SID and test all the voltages... I'm a bit worried because I'm sure the instructions on ucapps.do say to check this first, so maybe you aren't following those instructions... You should :) See the above.. There are tests for certain voltages on certain pins. Yeh... Smash's PICs come with the bootloader, and recently also MIOS, but not the MBSID application. If you haven't uploaded the application it definitely won't work! Well that could be one of many things. At this stage, I would disconnect the SID module, test all voltages, get the core working correctly, connect the SID module and test it's voltages, insert the SID and then test. Let us know how you go :)