So I went to turn on my power supply switch (after no installation or wiring changes since I last printed) and my printer turned on for less than half a second then shut off and will not turn back on. It is slightly cold (55-60F) in the are the printer is located.

I have an 8" i3v with a ATX power supply. I quickly looked at the wiring connections and did not see an issue. I have yet to ring out my wiring system.

Before I do so:
1. Do these supplies have an internal glass fuse that I should check first?
2. Has this happened to anyone before?

Many thanks!