This is a custom listing created for an eBay customer: Klipsch ProMedia 5.1 Kit for AC-DC Converter Board. If your ProMedia 5.1 has been silenced (sometimes a blown fuse is also a symptom, but that may be a power spike/MOV failure or a bridge rectifier shorting), check if there is soot on the daughterboard for the AC-DC converter board. If there is soot (I will attach a photo), then the daughterboard has shorted resistors and a nearby IRF740 MOSFET has blown. Replace the pair of IRF740 MOSFETs and the daughterboard, making sure you do not damage the copper sockets for the daughterboard and transistors when you desolder and remove them. An open trace will likely cause the replacement transistor(s) to also fail. For testing, I recommend using a much smaller fuse, such as 1.6 amp quick blow. If the power supply is working correctly, that fuse will hold. If there is a problem, the fuse may blow before further damage is done to other components.

Kit includes new daughterboard, two new IRF740 MOSFETs, heat sink grease, solder, testing fuse (1.6 A), and several short lengths of silicone insulated wire to use as jumpers if the traces on the original AC-DC converter board have been damaged.

I will also include a pair of used IRF740 MOSFETs. If a person is not sure if there are other problems and that the new IRF740 transistors will be damaged, then the used pair can be tried first or kept as a back up.

Once the transistors and daughterboard are installed, about 412 ohms should be measurable between the outer two leads of the IRF740s.