new to me f4 220

[Grant]

i got this unit used and not working... all it needed was the USB drive had to be redone to get it to fire up. I installed that installed 3 drives and got the newest version of TOS 5 on it, and it runs great... the issue I'm having is I have no HDD lights at all... they do not light up even when transferring data... i have a power and lan light and nothing else. is there a jumper or switch i may have bumped when i was getting the internal usb drive in or out? is there a setting in tos 5 that turns them off? i know its a little thing but i need my lights!!

[TMeric]

Thank you for your feedback. We need to know more details to locate your problem.
1. Does the HHD indicator light not turn on in any scenario?
2. The NAS device is powered on without hard disks. Insert the hard drive,What is the status of HDD indicators?