The Status Power LED indicator is on and green:
The device is powered on, but the lights aren’t flashing for D1,2,3 ,4 indicators.
Troubleshooting Techniques:
I switch the Ethernet cords on the LAN port.
Checked the wired connection.
Reset my Wifi Extender with ethernet ports.
Updated Wifi Extender Software.
Used Synology Assistant to see if Client was being received
Tried resetting the NAS using this link https://kb.synology.com/en-id/DSM/tutorial/How_to_reset_my_Synology_NAS_7
When I reset it beeps only once - I do not get the consecutive 3 beeps I need to hear.
You could power off the NAS, remove all disks, and power it on. Next, try to see whether you can connect to it.
Besides Synology Assistant, you can try Synology Web Assistant at HTTP://find.synology.com