i have cm mwe 750 gold fully modular power supply. when i turn on the computer only rgb lights turn on, no cpu cooler or case fan starts. the power supply makes a silent sound while its fan also does not run. it happened in the past few times when i hold the power button for long. yesterday the issue started more frequently when i turned off the pc by holding the power button for long(only few seconds until the pc shuts down completely. i want to know if my power is faulty or my motherboard is doing this issue.