My DS412+ can't power on

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My DS412+ can't power on

Hi All,

My DS412+ can't power on (No light at all in NAS). After I took out all hard disks also same.

What i found out as below.

-Before pressing the power on, network port has green light but when i press the power on from NAS, network port green light also gone.

- After that I unplug the backplane card, it can power on.

May I know it is my backplane card faulty or any other?

Thank you.
I open the box because NAS can't access and not able to power on. What I have done as below.
- I also check the power adapter and it showing green light on adapter so I believe power adapter is good.
- Next, I take out all my HDD and try to power. Still can't power on. I notice that after unplug and plug the power cable, network port have green light. But when I press the NAS power on button, network port green light is go off .
- Next, I took out the squares and take out the back plane card. After that I able to power on the NAS.
It showing blue light on NAS box and yellow light in status light(no back plane card and no HDD in the slot).

Thank you.
Guess in that case, you won't have anything else to do but upgrade to a newer model or get a replacement part.
Noted and thanks for advice.

Anyway to recover my data? I have try "DiskStation Manager - Knowledge Base | Synology Inc." but not successful. Below are the step that i do.

ubuntu@ubuntu:~$ sudo -i
root@ubuntu:~# apt-get update
Ign:1 cdrom://Ubuntu LTS _Focal Fossa_ - Release amd64 (20210209.1) focal InRelease
Hit:2 cdrom://Ubuntu LTS _Focal Fossa_ - Release amd64 (20210209.1) focal Release
Hit:4 Index of /ubuntu focal InRelease
Hit:5 Index of /ubuntu focal-security InRelease
Hit:6 Index of /ubuntu focal-updates InRelease
Reading package lists... Done
root@ubuntu:~# apt-get install -y mdadm lvm2
Reading package lists... Done
Building dependency tree
Reading state information... Done
lvm2 is already the newest version (2.03.07-1ubuntu1).
Suggested packages:
default-mta | mail-transport-agent dracut-core
The following NEW packages will be installed:
0 upgraded, 1 newly installed, 0 to remove and 219 not upgraded.
Need to get 417 kB of archives.
After this operation, 1,255 kB of additional disk space will be used.
Get:1 Index of /ubuntu focal-updates/main amd64 mdadm amd64 4.1-5ubuntu1.2 [417 kB]
Fetched 417 kB in 3s (162 kB/s)
Preconfiguring packages ...
Selecting previously unselected package mdadm.
(Reading database ... 189770 files and directories currently installed.)
Preparing to unpack .../mdadm_4.1-5ubuntu1.2_amd64.deb ...
Unpacking mdadm (4.1-5ubuntu1.2) ...
Setting up mdadm (4.1-5ubuntu1.2) ...
Generating mdadm.conf... done.
update-initramfs is disabled since running on read-only media
/usr/sbin/grub-probe: error: failed to get canonical path of `/cow'.
Created symlink /etc/systemd/system/mdmonitor.service.wants/mdcheck_continue.timer → /lib/systemd/system/mdcheck_continue.timer.
Created symlink /etc/systemd/system/mdmonitor.service.wants/mdcheck_start.timer → /lib/systemd/system/mdcheck_start.timer.
Created symlink /etc/systemd/system/mdmonitor.service.wants/mdmonitor-oneshot.timer → /lib/systemd/system/mdmonitor-oneshot.timer.
Processing triggers for man-db (2.9.1-1) ...
root@ubuntu:~# mdadm -Asf && vgchange -ay
mdadm: /dev/md/2 has been started with 3 drives.
2 logical volume(s) in volume group "vg1" now active
root@ubuntu:~# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md2 : active raid5 sda5[0] sdc5[2] sdb5[1]
5850870912 blocks super 1.2 level 5, 64k chunk, algorithm 2 [3/3] [UUU]

unused devices: <none>
root@ubuntu:~# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
syno_vg_reserved_area vg1 -wi-a----- 12.00m
volume_1 vg1 -wi-a----- <5.45t
root@ubuntu:~# mount /dev/vg1/volume_1 /home/ubuntu/test -o ro
mount: /home/ubuntu/test: wrong fs type, bad option, bad superblock on /dev/mapper/vg1-volume_1, missing codepage or helper program, or other error.
root@ubuntu:~# pvscan
PV /dev/md2 VG vg1 lvm2 [<5.45 TiB / 0 free]
Total: 1 [<5.45 TiB] / in use: 1 [<5.45 TiB] / in no VG: 0 [0 ]

I getting "mount: /home/ubuntu/test: wrong fs type, bad option, bad superblock on /dev/mapper/vg1-volume_1, missing codepage or helper program, or other error."

What can i do?

Thank you.

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