I have been checking the BJTs on a car audio amplifier board with my DMM's diode test feature, and I need a little help understanding something I have been noticing: The base to emitter and base to collector voltage drops are present, and show an open circuit when the leads are reversed as they should. But, when I connect the pos. lead to the collector, and the neg. lead to the emitter, my DMM reads a voltage drop of anywhere from 0.5v to 1.0v (with no voltage being applied to the base). Reversing the leads, it shows an open circuit. Is this how these are supposed to operate? I thought that in the absence of a voltage being applied to the base, there should be no conductance from the collector to the emitter, so I am confused as to why I am seeing the voltage drop from collector to emitter. This amplifier failed after the input stage was fried by too strong of an input RCA voltage (had about 9.0v coming in; amp is only built to handle up to 6.0v). Thanks in advance for any input.