Switch in stack keeps resetting

[DH1]

I have a stack with 5 x450e-48p switches. Back in January I replaced slot 3 due to it failing and all was good after that. A couple weeks ago slot 3 failed again so I replaced the switch and all was good until this past Friday when it started randomly resetting itself. I don't want to replace the switch again as I don't know if that is the issue. Could a bad stacking cable or module cause this? It is running on an older firmware of 12.4.1.7, could that be causing it?

[DH1]

I was able to reboot the slot last night and the node became operational. I did notice that the time is off by about 4 hours. Isn't the time synced from the master node? How do I get it to show the correct time? All the other nodes are correct.

[DH1]

10/09/2017 04:33:37.21 Slot-2: Slot 3 is not present to do card exec cmd POWER_OFF
10/08/2017 19:22:29.80 Slot-1: Module in slot 3 is operational
10/08/2017 19:21:44.31 Slot-1: Module in slot 3 is inserted
10/08/2017 19:21:40.08 Slot-1: Module in slot 3 is removed
10/08/2017 19:20:31.23 Slot-2: Slot 3 is not present to do card exec cmd POWER_OFF
10/06/2017 22:26:08.08 Slot-1: Module in slot 3 is operational
10/06/2017 22:25:26.25 Slot-1: Module in slot 3 is inserted
10/06/2017 22:23:46.25 Slot-1: Module in slot 3 is removed
10/06/2017 13:10:17.48 Slot-1: Module in slot 3 is operational
10/06/2017 13:09:35.26 Slot-1: Module in slot 3 is inserted
10/06/2017 13:08:47.62 Slot-1: Module in slot 3 is removed

I am not showing any errors on the stacking ports either. As of now, slow 3 is in a present mode and active in the stack but none of the connections are active.

Node MAC Address Slot Stack State Role Flags
------------------ ---- ----------- ------- ---
*00:04:96:34:f0:dc 1 Active Master CA-
00:04:96:34:f1:2e 2 Active Backup CA-
00:04:96:35:07:d6 3 Active Standby CA-
00:04:96:34:f1:64 4 Active Standby CA-
00:04:96:27:a1:b6 5 Active Standby CA-
* - Indicates this node
Flags: (C) Candidate for this active topology, (A) Active Node
(O) node may be in Other active topology
* # sh slot 3

Slot-3 information:
State: Present
Download %: 100
Restart count: 1 (limit 5)
Serial number: 800190-00-07 0820G-80558
Hw Module Type: X450e-48p
SW Version: 12.4.1.7
SW Build: v1241b7
Configured Type: X450e-48p
Ports available: 50
Recovery Mode: Reset
Node MAC: 02:04:96:34:F0:DC
Current State: STANDBY
Image Selected: secondary
Image Booted: secondary
Primary ver: 15.1.1.6
Secondary ver: 12.4.1.7
Config Selected: secondary.cfg

[Ash_Curtis]

Are there any logs from slot 3 which indicate why the node has failed? Are you seeing any CRC errors or link flaps on your stack ports?

The version you are running could certainly use an upgrade, the latest recommended release for an X450e is 15.5.3.2-patch1-14.

If you have access to this EXOS release, I would certainly recommend upgrading this stack as per the directions in this KB article:

https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-upgrade-EXOS-on-a-Summit-Stack