Supermicro X11DPH-I User Manual page 65

No Video
1. If the power is on but you have no video, remove all the add-on cards and cables.
2. Use the speaker to determine if any beep codes exist. (For error beep codes to function
properly, please connect an optional external speaker/buzzer to the onboard speaker
header located at JD1.) Refer to Appendix A for details on beep codes.
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. Check for any error beep from the motherboard. (For error beep codes to function
properly, please connect an optional external speaker/buzzer to the onboard speaker
header located at JD1.)
•
If there is no error beep, try to turn on the system without DIMM modules installed. If there
is still no error beep, replace the motherboard.
•
If there are error beeps, clear the CMOS settings by unplugging the power cord and
contacting both pads on the CMOS Clear Jumper (JBT1). Refer to chapter 2.
4. Remove all components from the motherboard, especially the DIMM modules. Make
sure that system power is on and that memory error beeps are activated.
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. Confi 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 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.
Chapter 3: Troubleshooting
65