what operating system you have on the server? If you have a supporting operating system you can update BIOS from operating system. For windows use "Windows 32 and 64 bit EXEs" and for Linux use ".BIN" file. You can also try to update using DOS bootable USB key with image "R710-060600C.exe"
I am attempting to update my BIOS on my PowerEdge R710.  I am a total newbie, so my questions are going to be extremely basic, please have patience.  I have done extensive research but am hitting a road block.  My current bios is 6.4.0, I need to upgrade to 6.6.0.  I found the Dell support page with the download.  [URL] It gives me lots of options for files to download on the Dell support page.  I know what exe files are, no clue what a .sign or .BIN file is, but I assume they don’t apply in my situation anyhow.  The instructions at the bottom of the Dell support download page (link above) says there should be a EFI file; lots of YouTube videos tell me to download the EFI file as well, but it’s nowhere to be found on the support page.  With no EFI file available, I skip that option and look for other options.  Another set of instructions says: “You can also load this executable directly from BIOS Boot Manager without a UEFI shell bootable media.1. Copy the file to a USB device2. Plug in the USB device and press F11 during POST to enter BIOS Boot Manager3. Navigate to the System Utilities menu and select BIOS Update File Explorer” I did step 1 and step 2, no issues, but this is where I run into a problem.  When I select the “System Services” option a reboot takes place and it enters into “System Services”.  A Dell screen pops up and says “Initializing UEFI, Please wait…” it then says “Entering System Services…Starting Unified Server Configurator”.  I have attached a picture, this is the last image I see before it goes black. [IMAGE]  A white loading bar slides across the screen from left to right.  Then the screen goes blank, no text, no images, just black.  My monitor is still working (it’s not a hardware or connection problem), there is just nothing being loaded on the screen. I hit every key on the keyboard and it does nothing.  I have let it sit in this state for 30 minutes and nothing ever loads or changes.  I need to restart to make the server do anything.  This is where I get stuck.  I have two different R710 units and they both do the exact same thing, I bought them from two different people, so it’s weird that I’m getting the same error for this process.  Is this normal?  Should I be able to get into system services somehow?  Do I need to install something first to make this option available? Any help is highly appreciated.
BIOs and System Services Errors - Questions from a Newbie