Hi, the pic you posted shows during post, we need to see the next after this /final one, could you do that for us please?

Hi,

It is stuck at POST. It doesn’t move from here and I can’t enter boot manager.

Hi, then you should try Minimum to post to get to support live image.

The minimum components to allow the Dell™ PowerEdge™ R720/R720xd to complete POST are as follows:

• One Power Supply
• Control Panel (for power button functionality)
• Working cable connection between control panel and system board
• One Processor (CPU) in socket CPU1 (minimum for troubleshooting)
• One Memory Module (DIMM) installed in socket A1
• System Board
• Backplane (for R720xd control panel connection)