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TROUBLESHOOTING

Troubleshooting processor related problems

Problem Identification Possible Cause Resolution
System is dead, no cursor, no beeps, no fan. Power cord failure. Plug in or replace power cord.
Power cords can fail even though they look fine.
Power supply failure. Replace the power supply.
Use a known-good spare for testing
Replace motherboard.
Use a known-good spare for testing.
Motherboard failure.
Memory failure. Remove all memory except 1 bank and retest.
If the system still won't boot replace bank 1.
Problem Identification Possible Cause Resolution
System is dead, no beeps, or locks up before POST begins. All components either incorrectly installed. Check all peripherals, especially memory and graphics adapter.
Reseat all boards and socketed components.
Problem Identification Possible Cause Resolution
System beeps on startup, fan is running, no cursor on screen. Improperly seated or failing graphics adapter. Reseat or replace graphics adapter.
Use known-good spare for testing.
Problem Identification Possible Cause Resolution
System powers up, fan is running, no beep or cursor. Processor not properly installed. Reseat or remove/reinstall processor and heat sink.
Problem Identification Possible Cause Resolution
Locks up during or shortly after POST. Poor heat dissipation. Check CPU heat sink/fan; replace if necessary, use one with higher capacity.
Improper voltage settings. Set motherboard for proper core processor voltage.
Wrong motherboard bus speed. Set motherboard for proper speed.
Wrong CPU clock multiplier. Jumper motherboard for proper clock multiplier.
Problem Identification Possible Cause Resolution
Improper CPU identification during POST. Old BIOS. Update BIOS from manufacturer.
Board not configured properly. Check manual and jumper board accordingly to proper bus and multiplier settings.
Problem Identification Possible Cause Resolution
System won't start after new processor is installed. Processor not properly installed. Reseat or remove/reinstall processor and heat sink.
BIOS don’t support new processor. Update BIOS from system or motherboard may have fracture.
Motherboard can't use new processor. Verify motherboard support.
Problem Identification Possible Cause Resolution
Operating system will not boot. Poor heat dissipation. Check CPU fan; replace if necessary; it might need a higher-capacity heat sink or heat sink/fan on the North Bridge chip.
Improper voltage settings. Wrong motherboard bus speed. Jumper motherboard for proper core voltage.
Jumper motherboard for proper speed.
Wrong CPU clock multiplier. Jumper motherboard for proper clock multiplier.
Improper drivers or incompatible hardware; update drivers and check for compatibility issues.
Problem Identification Possible Cause Resolution
System appears to work, but no video is displayed. Monitor turned off or failed. Check monitor and power to monitor.
Replace with known-good spare for testing.