Trackspot died last night. It's not the fuse

I just re-joined this forum to see if anyone knows what happened to my light.

One of my trackspots died last night. I first thought it was just the bulb but the whole fixture was dead as though it was unplugged. I thought it must then be the fuse on the back. I checked that fuse with a meter and it was fine. I also checked the fuse on the board (F1) and that one is fine as well. My thinking is that there is something wrong with the power supply.

This light was giving me trouble for a while in the dimming range. It would dim faster then the other trackspots which I found odd. I'm sure that has something to do with this.

What do you guys think?
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