What PSU are you using?
If you're using an AC PSU and inverter, then no, it won't turn on automatically.
today I was doing the final connections and when I turned the key on IGN, nothing happened w/ the PC... is it supposed to turn on by itself or do I have to do any other things? I did connect the psu to the motherboard so that shouldn't be the problem..
I tested the wires with a DC voltage tester and it did work so there is current and the connection to the PSU is good.. the problem is somewhere from the PSU because I hooked up my Xenarc to the PSU and that did not have any power either so it's the PSU but what about it?
sorry, I forgot to tell you that.hahah
no, I'm using the OPUS 150
so it should turn on automatically but why is not doing that?
double-check your wiring here: FAQ: How to Wire an OPUS PSU
also, the motherboard-switch-connector-wires on the 150 (black & red) seem polarity sensitive, so try changing the positions on one of the ends.
well damn it worked!!! lol I switched the Power On cable polarity like you said and that seemed to do the job!!!
Thanks tj!2k4 for the help! (you too DarquePervert)