You are correct, the current limiter most likely blew up because of an underlying problem with the power supply, such as shorted transistors and/or diodes. Don't try to simply replace it without checking the rest of the circuit first. Keep in mind that a bad part does not always look bad - you need to measure it to make sure.
If you are not intimately familiar with electronics, it might be a good idea to find someone local to help you. We (the forum members) will assist you the best we can, but there is only so much that can be done remotely.