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Hello.
Is it possible to connect to EC2 using serial console?
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/connect-to-serial-console.html
Also, have you checked the system logs of the EC2 instance?
Please check the system log to see if any errors are output.
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/troubleshoot-unreachable-instance.html#instance-console-console-output
Also try restoring from a snapshot.
https://docs.aws.amazon.com/prescriptive-guidance/latest/backup-recovery/restore.html
There may be multiple reasons for the failure of the EC2 instance status check, but I think it would be a good idea to first check the contents of the following document.
https://repost.aws/knowledge-center/ec2-linux-status-check-failure
As you say:
Select the instance and choose Actions, Monitor and troubleshoot, EC2 Serial Console, Connect.
Alternatively, select the instance and choose Connect, EC2 Serial Console, Connect.
Result:
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It looks like the instance type you're using doesn't support serial console, so you might want to take a snapshot and restore it on another instance.