I inherited a used i5 Vostro 460 from a friend. It will only randomly turn on when the front button is pushed. Sometimes it starts immediately, other times i have to push it multiple times, walk away, come back and try again. It may or may not start. Sometimes if i hold the button in, the fans will start but as soon as i release the button, the fans stop. The computer does not boot at that time. When i can finally boot it, it will run for days but then when turned off, it has trouble starting again.  I bypassed the front switch and have the same problem so it's not a switch issue. I tried another power supply but that did not resolve the problem. What else could be bad? The mother board? I can't use the computer in this condition so am considering scrapping it.