No Video; System Boot Failure; Memory Errors; When The System Keeps Losing Its Setup Configuration - Supermicro H12SSW-iNL User Manual

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No Video

1. If the power is on but you have no video, remove all the add-on cards and cables.
2. Check if memory module population is supported following guidelines, and re-seat
memory DIMM module(s).
Note: If you are a system integrator, VAR or OEM, a POST diagnostics card is recommended.

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:
3. Clear the CMOS settings by unplugging the power cord and contacting both pads on the
CMOS Clear Jumper (JBT1). Refer to Section 2.8.
4. Remove all components from the motherboard, especially the DIMM modules. Make
sure that system power is on.
5. 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 DIMM modules are properly and fully installed.
2. Confirm that you are using the correct memory. Also, it is recommended that you use
the same memory type and speed for all DIMMs in the system. See Section 2.4 for
memory details.
3. Check for bad DIMM modules or slots by swapping modules between slots and noting
the results.
4. Check the power supply voltage 115V/230V switch.

When the System Keeps Losing its Setup Configuration

1. Use a high quality power supply. A poor quality power supply may cause the system to
lose the CMOS setup information.
2. Check that the motherboard battery still supplies ~3VDC. If it does not, replace it.
3. If the above steps do not fix the setup configuration problem, contact your vendor for
repairs.
Chapter 3: Troubleshooting
49

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