Supermicro X12DPFR-AN6 User Manual page 55

No Video
1. If the power is on, but you do not have video, remove all add-on cards and cables.
2. Remove all memory modules and turn on the system (if the alarm is on, check the
specs of memory modules, reset the memory, or try a different one).
System Boot Failure
If the system does not display POST (Power-On-Self-Test) or does not respond after the
power is turned on, check the following:
1. Remove all components from the motherboard, especially the DIMM modules. Power
on the system and check if the power-on LED (LEDSYS1) and the BMC Heartbeat LED
(LEDM1) are on, and fans are spinning.
2. Turn on the system with only one DIMM module installed. If the system boots, check for
bad DIMM modules or slots by following the Memory Errors Troubleshooting procedure
in this chapter.
Memory Errors
1. Make sure that the memory modules are compatible with the system and are properly
installed. See Chapter 2 for installation instructions. (For memory compatibility, refer
to the "Tested Memory List" link on the motherboard's product page to see a list of
supported memory.)
2. Check if different speeds of DIMMs have been installed. It is strongly recommended that
you use the same RAM type and speed for all DIMM modules in the system.
3. Make sure that you are using the correct type of ECC DDR4 modules recommended by
the manufacturer.
4. Check for bad DIMM modules or slots by swapping a single module among all memory
slots and check the results.
Losing the System's Setup Configuration
1. Make sure that you are using a high-quality power supply. A poor-quality power supply
may cause the system to lose the CMOS setup information. Refer to Chapter 2 for
details on recommended power supplies.
2. The battery on your motherboard may be old. Check to verify that it still supplies
~3VDC. If it does not, replace it with a new one.
Chapter 3: Troubleshooting
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