The fan works when connected to a power supply. TIP122(compared with other new ones) resistance is the same. The VU1 has dent I think is because it popped (I heard it, then the fan stopped). The rests are ok, not sure about the inductor but its resistance is less than 1ohm.
All caps involved in the fan already replaced, still not working.
I think you are right about the bulging cap, but I think the 8pin is also damaged.
The new 8pin Viper22A does not work, do you think TPC8032-H mosfet is the right one, see pic.