Now whenever I turn it on, the fans/etc. turn on for approximately 1 second, then everything immediately shuts off.
Here are my specs:
Intel Desktop Board dg33fb
Intel Core 2 Duo E7500 @2.93 GHz (stock) w/ stock cooler
Diamond Radeon HD 4670 w/ Zalman VF900 cooler
Patriot PC2-6400 2GB RAM (2x1GB) PSD22G800K
Thermaltake 500w PSU
Maxtor 320GB HDD
I have already determined that it is not a PSU problem, as I tried it with two different PSUs and the problem persisted.
I also tried removing all components except the Processor/fan, and then the CPU fan did start up and stay on, and I got the BIOS code of 3 beeps.
3 beeps - Base 64 K memory failure
* Reseat the memory.
* Make sure that the contacts on the memory and the socket are clean.
* Try removing one bank of memory modules at a time. Note: Some systems might need to have a memory module in Bank 0.
* Try using memory modules from the same manufacturer with the same part number and speed.
* Check for a faulty memory module by trying the memory in a known good system.
* Trying known good memory in the system.
* Check the power supply and check for power fluctuations.
* If the steps above do not resolve the problem, the desktop board may be defective. Try a different desktop board.
This made me think that maybe my MOBO wasn't screwed, so I tried each of the 2 RAM sticks individually, and it shut down as before.
Then I tried known good RAM from another computer, still nothing.
I also tested the MOBO battery with a multimeter, and it was good.
So unless someone knows anything else I could try, then I suppose I need to buy a new Motherboard.