I am working on identifying an issue with blown fuses in a subwoofer for a friend. The subwoofer is a Velodyne SPL-R10. The subwoofer has blown several fuses and I am attempting to locate any loose connections that may have caused a short. I am very inexperienced with complex circuits such as amplifiers, so I assume that would be the main cause of a blown fuse, and would also be the only problem I would be able to fix. My question is, how do I discharge the capacitors on the circuit board? I opened the panel and see that there are 6 capacitors (all 200V 470uF) and I assumed that it would be dangerous to tinker any further. I know from my little knowledge of electronics that 200V is a substantial amount of voltage, and that the capacitors may still be charged. Also, how do I tell how much current the capacitors would discharge? I know current (I) equals volts (V) * amps(A), but with a charged capacitor, I am not sure how to calculate it. Attached is a picture of the capacitors, if it helps at all. I am not sure if the capacitors are in series, parallel, or even attached to one another in any type of configuration. There is also another picture of a copper coil of some sort. Is that an inductor? What is the purpose of this? I appreciate any help with this, as I do not want to shock or especially electrocute myself. The grounding of the capacitors is my main concern, but I would also like to learn a few things in the process. Thanks in advance.