Something here may help.
https://www.dell.com/support/article/en-us/sln292433/dell-poweredge-no-boot-device-available-is-displayed-during-startup?lang=en
--please don't forget to Accept as answer if the reply is helpful--
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I was using Dell PowerEdge R730 as a PACS server with Windows Server 2012 R2 operating system, now I'm facing a "No boot device available" error because of the following issues which I perform:
Please assist me with the issue.
Something here may help.
https://www.dell.com/support/article/en-us/sln292433/dell-poweredge-no-boot-device-available-is-displayed-during-startup?lang=en
--please don't forget to Accept as answer if the reply is helpful--
Hi,
Please check the information in the link below:
Advanced troubleshooting for Stop error 7B or Inaccessible_Boot_Device
https://learn.microsoft.com/en-us/windows/client-management/troubleshoot-inaccessible-boot-device
Best Regards,
Carl