I have an MSI MBd . MS-7125 VER:1 on my bench, with no components or anything plugged in except a PSU. When I turn the PSU on, all fans start to run without any start button. I have a spare MS-7125 VER1 and that is the same. This problem exists when inserted into the case and all components installed. After installation ,I switch on the PSU and all fans start up on case and MBd, and presumable the BIOS circuitry. Get "no connection through PC " on monitor. Have changed video card still the same. Suggestions please!!