Replace Power Supply Unit (PSU)
If a PSU or its fan malfunctions, please see the instructions below to replace the malfunctioning PSU.
1 Unplug the power cord from the PSU to be replaced.
Note:
By pressing the Beep Off button, you can silence the long beeping sound when you hear it.
2 Push the lever of the PSU at the back panel in the indicated direction.
3 Pull out the PSU from your FS3400.
4 Prepare a new PSU, and push it back to the slot until you hear a click.
Initial Troubleshooting Guide
We have selected several helpful articles on frequently asked questions to help you do initial troubleshooting on
your Synology NAS:
• General
What can I do to troubleshoot NAS connection problems?
•
What is the width of my Synology NAS server?
•
• Hard Disk Drive
How to choose the right HDD for my Synology NAS
•
How to diagnose drives' health status when receiving bad sector warning
•
How to fix hard drive failure and retrieve the data from your hard drives
•
• Memory
Are there any requirements for installing or expanding system memory capacity?
•
How can I run a memory test on my Synology NAS?
•
Why is there a startup delay after a memory upgrade?
•
• LED
How do I recognize a hibernating Synology NAS via the LED indicators?
•
What can I do if the STATUS LED keeps flashing in orange?
•
Why am I unable to install my Synology NAS and why is the Power LED indicator flashing
•
constantly?
•
Why are the LED indicators on the LAN ports of my Synology NAS not working?
• Fan
•
What type of fan speed modes are available on my Synology NAS?
23 Chapter 3: System Maintenance