CBS220-24FP switch boot-loop out of the box

[VasileT]

We bought a few CBS220-24FP switches. Most of them are already installed and working fine, but one refuses to start properly.
It is stuck in a boot-loop with the following console output:

CPU:500MHz LXB:200MHz MEM:300MHz
CPU : 500 MHz
RAM : 256 MB
FLASH: 64 MB

Model: CBS220_24T_4G_v2
MAC : 2C:XX:XX:XX:XX:XX

Memory test............PASSED

Hit Esc key to stop autoboot: 0
## Booting image from partition ... 0
Image Name: 2.0.1.5
Created: 2021-09-24 13:29:15 UTC
Data Size: 18435725 Bytes = 17.6 MB
Verifying Checksum ... OK
Uncompressing Kernel Image ... OK

Starting kernel ...

Restore Factory Default Success!
Rebooting now...
reboot: Restarting system

In the "Hit Esc key to stop autoboot:" menu, option number "[4] Loader Shell" asks for a password, but no matter what password you type, it keeps turning me back to the same menu.

[1] Password Recovery Procedure
[2] Restore Factory Defaults
[3] Erase Flash File
[4] Loader Shell
[5] Start Fresh From Scratch
[0] Exit
Enter your choice:

The whole time the switch is trying to boot, all the LEDs are flashing except the power LED which does not turn on at all.

I wonder if someone had the same problem and managed to load a newer firmware using the "Loader Shell".
BTW I can't find any reference to this Loader Shell in the documentation.

[marce1000]

 - Have you tried any other options ,like for instance [1]  ; (for the time being only in the context of analyzing the boot problem) , ?

 M.

[VasileT]

Yes.

All the other options, [1] included, lead to restarting, which again ends up in a loop.

[marce1000 · Accepted solution]

  - The device is then probably faulty , and you need to ask for a replacement  (RMA)

 M.

[balaji.bandi]

Looks some reported same issue, some users upgraded to latest firmware fixed the issue, if that is not the case with you Raise SMB tac case for replacement.

https://www.cisco.com/c/en/us/support/web/tsd-cisco-small-business-support-center-contacts.html