Troubleshooting Changes in BIOS Settings
Certain changes in BIOS settings (such as chipset timing or latency, memory timing or latency, processor clock frequency, etc.) can cause a system to no longer boot.
If you are able to enter the BIOS Setup by pressing F2, reset the BIOS to factory defaults by pressing F9. Save and exit the BIOS Setup.
If you cannot enter the BIOS Setup, clear the CMOS by following instructions:
1Power down system. Do not unplug the power cord.
2Open the system chassis. For instructions, see your system manual.
3Move jumper (J15) from the default operation position, covering pins 1 and 2, to the reset / clear position, remove the cover from pins 1 and 2.
4Remove AC power.
5Wait 5 seconds.
6Move the jumper back to default position, covering pins 1 and 2.
7Close the system.
8Power up the system.
The CMOS is now cleared and can be reset by going into BIOS setup.
NOTE: Removing the AC power before performing the CMOS Clear operation causes the system to automatically power up and immediately power down, after the procedure is followed and AC power is
You may also need to perform a BIOS bank select after clearing the CMOS.
Collecting System Event Log for Investigation
If the front panel LED blinks for 30 to 60 seconds upon applying AC power to the power supply, the baseboard management controller (BMC) is initializing. If not, then the BMC is not functioning. If the BMC is working, try to gather system event log (SEL) information for investigation.
