Can I run the risk to short it out...

Hi, I was wondering if it is possible to burn some thing if I go from the mixer in/out halfway (MONO JACK) to the external input, I recently had an accident with the board and was wondering if this could have been the cause.

Some of you may wonder why I get the signal from here instead from the right output…well ..I do it this way cause it doesn’t depend on the output level…but now I am getting a little paranoid with all this, I don’t wanna pay for the analogue board again, it has been pretty expensive.

Any answers may be much apreciated.

THANKS…