The rear fan has scrapping noise coming out of it.
A.Loosen the four screws slightly. When the rear fan is spinning at high speed, it may produce a scraping noise if the screws are tightened too much.
If the pre-installed fans are spinning but the lighting does not activate on first startup
Please press and hold the M1 and M2 buttons simultaneously. If the issue persists, try reconnecting the controller board’s SATA power cable.