I have a Compaq presario. I have a Compaq presario v 3000 and it wont power up. I had taken it in

Question

I have a Compaq presario v 3000 and it wont power up. I had taken it in before my insurance expired(october) and they said it was my motherboard and it was fixed well now its november and it is back to the same problem and wont power up.