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Chapter 7: Troubleshooting and Support
3. Make sure that no short circuits exist between the motherboard and chassis.
4. Disconnect all cables from the motherboard, including those for the keyboard and mouse.
5. Remove all add-on cards.
6. Install a CPU, a heatsink, connect the internal speaker (if applicable), and the power LED
to the motherboard. Make sure that the heatsink is fully seated.
7. Use the correct type of onboard CMOS battery as recommended by the manufacturer.
Check to verify that it still supplies ~3VDC. If it does not, replace it with a new one.
Warning
: To avoid possible explosion, do not install the battery upside down.
8.
Verify that all jumpers are set to their default positions.
9. Check that the power supplies’ input voltage operate at -48V.
10.
Turn the power switch on and off to test the system
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:
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
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
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 -48V switch.
Losing the System's Setup Configuration
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. .
2. The battery on your motherboard may be old. Check to verify that it still supplies ~3VDC.
If it does not, replace it with a new one.
