SRX4100 power off unexpectedly, device took long time to boot back to be accessible.

• Unexpected power off:

                    Last reboot reason: 0x8:power-button hard power off

• Device not booting
• OS 18.4R3-S2 is EOS since 06/22/2022.
• No logs prior the power off reporting failures on the device.
• No logs during boot time.
• Logs after the device boot and was accessible do not report any failure.
• Device is health. No alarms neither core dumps.

Unable to proceed with RCA if no logs are registered on the device.

Suggest customer to consider upgrade. Refer to KB for suggested versions:

 

Junos Software Versions - Suggested Releases to Consider and Evaluate
https://supportportal.juniper.net/s/article/Junos-Software-Versions-Suggested-Releases-to-Consider-and-Evaluate?language=en_US