pc sometimes wont start

Hi i have a problem that my pc sometimes when i push the power button it wont start but then after many tries it does start... I even tried to use the reset button and even the screwdriver trick...and i am not sure where the problem is coming from and i need help PLEASE

Hi There, My Pc sometimes turns on and sometimes doesn't. when the pc is on it works fine! i could play on it for hours! after i shut down if I come back an hour later it wont turn on. I am not sure if its hardware. all motherboards lights are on too but still sometimes wont turn on. Hope to...