Should I be concerned that some of the MOSFETs are evidently making good contact (as evidenced by the impressions they made in the spongy gray thermal pad) and other MOSFETs (positioned in the center of the pad) are not making any contact?



I remember my dad teaching me when I was young what a MOSFET was. I don't actually remember much. Field Effect Transistor. The MOS, I think, was a particular manner of die used, I think. I guess I don't care to look it up. I was more just reminiscing about my dad, now passed away 10+ years ago. About my dad: http://www.rodatus.net/family/mydad.htm