I'd go back to basics and try and get it running with just the basic front panel things connected to the board eg Power on SW, Reset SW, Power LED and perhaps the HDD LED. Make sure the polarity of your connections is correct or LEDs won't work and you could have problems. You also need to check any add in cards have power supply connections provided if required eg some graphics cards have their own power socket as well as getting some power through the motherboard slot.
I'm not sure what your temperature sensing thermister is all about but if this is a component that came with the board originally, the motherboard manual should explain all you need to know about it and how to connect it.
That is a very good idea. One I did not think of myself. I thought I was sure of the polarity on the LED's but your right to check it. On the thermister, I know, I also would have thought something would be in the references. I originally bought the comp used a while ago and perhaps the person before me was trying to make a gaming computer out of it and added some things to it. If that is the case then it may not have been connected when I took it apart. Very helpful info, thank you.