Originally Posted by steve dunham
If your want to play at being an electrician then you need to dress the part. If the OP doesn't own or know how to use a meter than replacing the converter is probably above his pay grade.
Well if your point is that its best to get someone more expert to help out in person, then you might be right.
But a typical converter has a 120 volt AC connection (often just a plug like about everything in your home), and two other connections for the 12 volts DC. Yes, you need to match positive and negative on the DC side.. but that is light
years easier than learning to use an oscilloscope.