My 310 s sounds like it wants to boot up and turns on and shuts right back off what can i do

You dont say what operating version of windows you have
If you are using XP or VIsta you can try to boot to safe mode. That means that when you start it, start tapping f8 right away and see if you get a menu that lists startup options. If you do, select safe mode and see if it boots. If this does not work, then you might be getting beep codes. IF you are please list what they are.
1. If you arent getting beeps and the unit wont start then you need to start taking things off the computer. That means everything! Take key board and the mouse and all the cards except the video card and see if it will boot. IF it wont then you need to remove the ram and the drives and see if it will boot. If it wont boot then you are looking at the motherboard, the CPU or the Power supply. The power supply is the most likly culprit and it is the cheapest to replace. You can take it out and take to someplace to have it tested.