So my desktop has been out of action for a while. It turns on for like 4 seconds and then cuts out, doesn't even POST. The PSU's fans still spin when I turn it on. Could the PSU still be dead. Another note is that when I remove the ram on boot, there are no beeps suggesting the mobo is dead. I just want to make sure it is the mobo and not the PSU. So could a PSU's fans still spin after dying?