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X9DBU-3F/X9DBU-iF Motherboard User's Manual
No Video
1. If the power is on, but you have no video, remove all add-on cards and
cables.
2. Use the speaker to determine if any beep codes exist. Refer to Appendix A
for details on beep codes.
System Boot Failure
If the system does not display POST or does not respond after the power is turned
on, check the following:
1. Check for any error beeps from the motherboard speaker.
•
If there is no error beep, try to turn on the system without any DIMM module
installed. If there is still no error beep, try to turn on the system again with only
one processor installed in CPU Socket#1. If there is still no error beep, replace
the motherboard.
•
If there are error beeps, clear the CMOS setting by unplugging the power cord
and contacting both pads on the CMOS Clear Jumper (JBT1). (Refer to Sec-
tion 2-8 in Chapter 2.)
2. Remove all components from the motherboard, especially the DIMM mod-
ules. Make sure that the system's power is on, and memory error beeps are
activated.
3. Turn on the system with only one DIMM module installed. If the system boots,
check for bad DIMM modules or slots by following the procedure of memory-
error troubleshooting in this chapter.
Losing the System's Setup Confi guration
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 Section 2-7 for details on recommended power supplies.
2. The battery on your motherboard may be old. Check to verify that it still sup-
plies ~3VDC. If it does not, replace it with a new one.
3. If the steps indicated above do not fi x setup confi guration problems, contact
your vendor for repairs.
3-2
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