Hello petitvansharen,   Was anything done on the server around the time this happened? Anything added or removed?   Try a flea power drain and check results. drain flea power (shut down, disconnect power cables and Network cables, hold in power button 20 seconds with cords removed).  After flea power drain, system has to set for 3 minutes for DRAC to reset without any power plugged in, then plug in NIC and power but wait 2 minutes before power on to give DRAC time to initialize.   If you are able to access the iDRAC see if its firmware is up to date and if not see if you can update it. I'd recommend to export a copy of your iDRAC license, if you have one, in case you need to replace the system board.   Try removing all memory except  CPU1's   A1,  CPU2's  B1 and test. If you still get the errors try two other DIMMs in their place. Add DIMMs back in until you find faulting DIMM.   Pending results of that, you may need to bring it down to Minimum to post for testing. This is minimum components to POST, it won't boot, this is to test POST. If successful POST, put things back a little at a time until find faulting component.   The minimum components to allow the Dell™ PowerEdge™ R730/R730xd to complete POST are as follows: *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   Remove anything not on that list: DVD, Hard drives, PERC controller,  network card, NIC cable, any pcie cards, keyboard, mouse, USB devices, ….  anything not on the list remove.   If you get successful POST, put things back a little at a time until you find the faulting component. If it does not POST try the other processor and a different DIMM for CPU1 and A1. If it still does not post then the issue is with one of those minimum-to-post components.    
My dell server R730 stop working and i found many alert on LCD :     
Dell R 730