Hey guys I built my computer about 6 months ago and it has been running perfectly like a total beast. However, 4 days ago i moved it and set it up at my parents place, worked fine. I just moved back to my apartment and now when I turn it on i notice my lower 120mm fan isn't lit up / spinning. This causes the computer to eventually shut down. Upon starting it again it does a High pitch, low pitch, high pitch, low pitch beep. It then proceeds to eventually shut down. Disconnecting all the 120mm fans it shuts down almost immediately, so i'm pretty sure its an issue with the fan. Anyone have a suggestion of what to do next I pretty much can't believe this issue came up.
One of the case fans not running would never cause the PC to overheat in that case. It sounds to me like your PSU may be faulty.