Go to bestbuy and get a new one and try it out. Why in the world would you buy all of that because you don't know the problem. If it happens with the new PSU, return it. If you want a new self built PC let me know and I can give you some advice with a budget.

Edit:

With the budget I can help you build a computer you can max everything for atleast a year or 2 from parts on amazon cheaply.