System Does Not Post, And Post Code Indicator Reads "C; System Does Not Post, And Post Code Indicator Reads "55 - EVGA Z390 FTW User Manual

EVGA Z390 FTW (123-CS-E397)

System does not POST, and POST code indicator reads "C"

When the system powers on, the POST code indicator should cycle through several
different codes before booting. However, if the boot process does not complete, you
should look at the LED indicator, as it will give you diagnostic information. When a
POST code indicator cycles through codes and stops at a specific code, this is an
indication that initialization of a specific component or process on the board failed. If
you power on the board and it goes directly to "C," and nothing else, that is an
indication of a CPU-related issue. If the board cannot detect the CPU in the socket, the
POST code display will display a "C", as well. It is not likely a faulty CPU, although it is
possible; instead, it is most likely a CPU power issue. Above the CPU socket, there is
one 8-pin power connector (as shown in the image to
the right). This connector is the main power for the
CPU, and without power from the PSU the system
cannot fully power on and initialize.
Make sure the plug is fully-seated and also make sure
that the tab on the socket and the release on the
power connector are on the same side. If the
connectors do not line up, then you have plugged in a
PCIe 8-pin into the EPS connector, which may cause
irreparable damage to the motherboard or the CPU.
If the PSU is modular, make sure the cable is fully-seated on the PSU side as well. Also,
only use cables from your PSU manufacturer for your specific PSU, because using a
cable designed for a different PSU may have catastrophic effects. Finally, ensure that
the cable on the PSU side is plugged into the connector for the CPU, typically labelled
"CPU" or "EPS," but consult your power supply manual for the correct plug.
System does not POST, and POST code indicator reads
"55"
A POST code error reading "55" indicates a memory issue. Verify that memory is
installed, and that is it properly seated. Make sure that the memory is on the official
support list at www.evga.com/support/motherboard and click on "EVGA Z390 FTW."
If the memory is not on the list, it may still work because EVGA is unable to test every
memory kit released. However, this motherboard will not support modules over 16GB
or ECC/Registered RAM.
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