Curley83475824,   I would start with trying the servers minimum to post configuration, which is removing everything internally and externally from the server but the following;   ● System board● One power supply unit● One processor (CPU) in socket CPU1● One memory module (DIMM) installed in socket A1● Left control panel (for power button functionality)● One backplane card   After removing everything but the devices listed above then try powering up, if it still doesn't power then try swapping the power supply with the other. If it still doesn't post after that then try both power supplies, individually, in the power supply 2 slot. This will see if it may be an issue with a slot.   If it still doesn't work then I would go through the minimum to post list and verify all of the devices are seated firmly, you can also try reseating each (if possible).   Let me know what you see.    
A friend gave me an R730xd. It was working fine before he brought it here (I was logging in remotely to it). Something must have happened during transport, because now both power supplies are blinking amber and it won't power on. I know both power supplies didn't suddenly go bad, so it must be something else, but I have no idea what it could be. I tried re-seating everything I could, but that didn't help. Other symptoms: The middle fan briefly comes on and then turns off. The 4 Ethernet ports blink, but not the iDRAC8 port. I tried resetting the iDRAC8 using the info button, but I still can't ping it at 192.168.0.120. It's out of warranty and I don't want to spend a lot of money fixing it, but it would be a shame to throw it out.
R730xd won't power on