You've got a problem. I couldn't find out what kind of motherboard you have either. Can you look on the motherboard itself and find a model number and manufacturer? It should be close to the CPU or along the PCIe slots.
If not, you could do a little investigative work. The reset should be easy, turn on the pc and short the posts around where you found the start switch until it resets. The system power and hard drive leds will be harder. You'll have to use a multi-meter set for DC current greater than 12v. Then probe with the multi-meter leads until you find the one that's always on. That's the system power. Run a defrag program and then probe until you find two posts that give an intermittent current. That's the hard drive led. Good luck.