It's a crap-shoot. There are basically 3 main reasons you can't talk to people (there are more, but these are vast majority of them):
1. Bad microphone element. In this case the rig will go into "transmit" mode, but no one can hear you, though you are putting out a radio signal.
2. Bad cable/connector/switch. Here, the signal from the mic when you push the talk button doesn't get to the radio to make it go into transmit mode. When you press the mike, the speaker may shutoff, but the transmit light doesn't light.
3. Blown "finals". The worst scenario. The RF power section in the rig is gone and transistor(s) and/or other components need to be replaced to make it work again. May look like it's transmitting, but there is little to no signal coming out.
I agree it's stupid to mess with trucker. Immature and nothing to be gained by it. It just makes the radio useless for others who need it -- did you get on this forum just to "mess" with us? Why would you abuse a communications medium like that? Doing so makes you an @ssh0le if you do.