|Test the power supply. Unplug the main power cord, open the case, & unplug all the power supply plugs. Then bend a paper clip into a U-shape & insert it into the main ATX plug with one end of the "U" going to the green wire & the other end going to any black wire. Plug in the power cord & see if the fans spins up. If it doesn't, the power supply is dead & will need to be replaced.|
Here's a visual: http://www.motherboards.org/images/...
"I don't have any money to buy a new power button or pcv for that instance"
If it's bad, it's bad. You're going to have to find a way to come up with the money.