@graysenfisher
It's a bit difficult without knowing the exact components but try a power refresh and check if that works.
Turn off the PC and then disconnect the power from the PSU.
Open it up and look for a coin cell battery on the motherboard and if one is there remove it as well.
Next, ''press and hold the power button operated for a full 30 seconds and then release it.''
Reinsert the coin cell battery on the motherboard (+ve side up as marked on the battery) reassemble the PC, reconnect the power to the PSU and turn it on and check.
If still no good usually Dell PCs have 4 diagnostic lights on the back of the case which is a code to tell you what's wrong. Also if the power button light is flashing or is a different colour. That's why knowing what Inspiron model the motherboard came from would really help.