I have a Bose Wave Radio which is completely dead (no display). There is a burst of static when I unplug it. The fuse is good, the transformer appears good and there is nothing obviously wrong with the circuit board. I'm thinking this might be a problem on the circuit board and I could buy a similar working radio on eBay and swap circuit boards. I saw one with cosmetic problems and no remote that would be suitable. Otherwise Bose wants $75 to fix. With these symptoms can this be the circuit board or a problem with the upper/display part of the radio?
Thanks

Trace from the power cord in, through fuse then Power supply, also verify power switch.

$75 bucks is not a bad deal when you consider it includes the shipping, repair, and a one year warranty. Not to mention you know it will be done right.

That burst of spark you saw, was it at the receptacle or inside the Bose?

If it's at the receptacle, then put a meter on it and see if you are still getting 120 VAC. If yes, turn the breaker off and pull the receptacle, look for a loose connection.

Since the Bose does provide a return path to the circuit, there could have been a Neutral to ground short. Please make sure to turn the breaker off, do not be a hero and then get knocked on you posterior by a hot line.

Also, do you have an "O" scope and know how to use it? If so, see what you are getting power wise, from the line cord to the out of the transformer. If there is a diode bridge or rectifier chip, set the scope to DC and measure the output of the diodes to ground. The spark may have taken out the rectifier circuit.

Personally, I'd spend the $75.00 rather then get inside and destroy something else. Plus as mentioned previously, there is the warranty you would now have.