>>2934140
sorry, when i said "sitting up against it", the "it" i was referring to was the negative space, i.e. the part of the lid that *wasnt* darkened. hopefully pic rel clears it up.
its very possible that something is blown in your circuit, but i wouldnt count on that dark shadow for evidence of that. it really just looks like dirt/dust, or maybe faster oxidation from increased airflow. i mean, you can literally see it go all the way around the lid.