Ive gone through 2 power supplies because another is on the way. My computer friend advised me to get a new mobo. I put my computer to sleep one day and it did not come back on. We took it apart to troubleshoot and got it to work. He said get a new mobo because it could be shorting. I did, i havnt put it to sleep since, but when i turn the computer off, it will not turn on until all power has left the machine. I think itis the psu so i ordederd a new one. Any ideas?