Hello There is a troubleshooting document on the R730 support page. It has a section about troubleshooting a no POST situation. [URL] I think both the power button and LCD are part of the control panel assembly. If you have another R730 to swap with you might try swapping the control panel. You can also try swapping the cable for testing purposes. Thanks
I have an R730 server which was working fine, but suddenly stopped powering up. When I turn on the system doesn’t power up, no POST, LCD keeps flickering in blue color with no text on it. There is no light on power switch either. Both power supplies are fine, checked with a working R730. Pulled RAM, still not giving any clue. Any help is highly appreciated.   Thanks
PowerEdge R730 No POST, No Power, LCD Blue