Supermicro SuperServer SYS-121H-TNR - No Video; System Boot Failure; Memory Errors; Losing the System Setup Configuration

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Chapter 7: Troubleshooting and Support
No Video
If the power is on but you have no video, remove all add-on cards and cables.
System Boot Failure
If the system does not display Power-On-Self-Test (POST) or does not respond after the
power is turned on, try the following:
• 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 below.
Memory Errors
• Make sure that the DIMM modules are properly and fully installed.
• Conrm 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 3.4 for memory
details.
• Check for bad DIMM modules or slots by swapping modules between slots and noting the
results.
Losing the System Setup Conguration
• Always replace power supplies with the exact same model that came with the system. A
poor quality power supply may cause the system to lose the CMOS setup conguration.
• Check that the motherboard battery still supplies approximately 3VDC. If it does not,
replace it.
If the above steps do not x the setup conguration problem, contact your vendor for repairs.
When the System Becomes Unstable
If the system becomes unstable during or after OS installation, check the following:
• CPU/BIOS support: Make sure that your CPU is supported and that you have the latest
BIOS installed in your system.
• Memory: Make sure that the memory modules are supported. Refer to the product page on
our website at www.supermicro.com. Test the modules using memtest86 or a similar utility.
• Storage drives: Make sure that all drives work properly. Replace if necessary.