Update: when I connect my L2t to an L2m through the Line6 link system, whatever is plugged in the mixer of the L2t comes loud, clean and clear on the L2m, but still distorted, weak and intermittent on the L2t.
So, the L2t mixer works properly, the L2t power amp and speaker work properly, it must a connectivity or digital issue between the mixer and the power amp, then?
Also the purple LED light does not come on when the unit is turned on, it never worked actually.