Hello Dylan and Erman,  I tried clearing the NVRAM but without any success, so I decided to replace the system board. After replacing the system board the R815 was boot looping with no POST messages at all. So I moved the system board applying some force, pushing it toward the I/O board, in order to better settle the connection between the two boards. After such attempt the R815 started booting correctly but two banks of memory (A3 and A7) were returning errors (even switching the installed memory units). So I removed processor one, cleaned its contact and mounted it back again. After such change the R815 started working correctly. Now it completes the POST and enter the BIOS setup if I press F2 or boot VMware ESXi if I don't press any key.  I think that probably the errors with the other system board were due to a bad connection between the system board and the I/O board or otherwise there was a processor not properly installed.  The lesson I learned is that it's necessary to be very careful when installing the CPUs or installing a new board to ensure that all the contacts are clean and aligned sot that a perfect electrical connection is established between the components we are installing. If something does't work a possible solution is to remove and reinstall the changed components after cleaning their contacts.  In any case I wish to thank Erman and Dylan that helped me greatly to focus toward the final solution. Thanks again, Manlio    
Hello,  I'm new here so I apologize if I'm not following some rules of which I'm not aware. My name is Manlio, I own a Dell Poweredge R815 and I'm experiencing a number of issues. At present my server is equipped with four 6376 AMD Opteron CPUs, 256GB of RAM and an H700 Raid controller.  I'm testing VMware ESXi with a single 1TB SSD drive.  The server has been working for some time than stopped working (no POST). I purchases a bare-bone R815 for the spares and replaced the motherboard (I mean the board with the NICs, not the one with the CPU). Now the server does the POST but stops after displaying the iDRAC Configuration Utilily IPv6 and IPv4 settings. The last message I can see on the screen is "Press for Remote Access Setup within 5 sec......".   Even if I press (at proper time) F2, F10 or F11 to enter BIOS settings, services or Boot configurations nothing happens. It stays there forever.  I can only see is that the keyboard is being cyclically reinitialized.   Anyone can help me to make it work again?  Thank you in advance, Manlio
Dell R815 not booting nor entering BIOS setup