System Does Not Post, And Multi-Function Display Reads "55; System Does Not Post, And Multi-Function Display Reads "D7 - EVGA Z790 DARK K NGP N User Manual

EVGA Z790 DARK K|NGP|N (121-RL-E799)
Consult your power supply manual to confirm the correct cables for your motherboard.
If the PSU is modular, make sure the cable is also fully-seated on the PSU side. Only use
the manufacturer's officially-supported cables for your specific PSU. PSU cables are not
standardized in the industry; using a third-party cable may have catastrophic effects.
System does not POST, and Multi-function Display
reads "55"
A "55" POST code error indicates a memory issue. Verify that memory is properly
installed and fully-seated. Make sure the memory is compatible with the specs of this
motherboard and your processor. Most memory kits tested by EVGA are fully
compatible with this motherboard. However, this motherboard will not support
modules over 32GB or ECC/Registered RAM.
If your memory should work on this motherboard, the next step is to try to boot with
only one stick of memory in "DIMM slot 1". If this is your first boot with the
motherboard and the board will not POST, or you recently installed new memory, press
the "Reset CMOS" button. The system will power on when the Reset CMOS button is
pressed. This should allow the system to boot up. When you see the EVGA Z790
DARK K|NGP|N screen, press "Delete" to enter BIOS, set the XMP profile
(instructions are covered in first boot section on Page 52), save and exit, and the system
will reboot. If the system reboots successfully, you can power down and install the rest
of the memory to retest.
System does not POST, and Multi-function Display
reads "d7"
A "d7" POST code indicates that the motherboard cannot detect a keyboard or input
device. When this happens, some video card / monitor setups will display a message on
screen about a Keyboard error, while others will just remain blank. Power down the
system and reseat the USB connector. Make sure the keyboard is only plugged in to a
USB3.2 Gen1 slot.
Older wireless keyboards can sometimes cause this issue. For legacy wireless keyboards,
we recommended that you plug in a regular USB keyboard, reboot, enter BIOS, and go
to Advanced – USB Configuration. Make sure "Legacy USB Support" is set to
"enabled," then save an exit. Power down and then reconnect your wireless keyboard.
At this point, the board should POST past "d7."
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