Test the coil, primary resistance continuity should be 1.4>2.0 ohms. Secondary resistance in the range of 4>5k ohms. I seriously doubt doing this will take out the coil, but I haven't tested that situation.
The test procedure for the gold box amplifier and the trigger unit are outlined in the service manual, though they describe the use of a special tool. However you can do most of the testing without the tool using only a voltmeter.