add the peripheral cards back one by one until you find
the bad one.
LED
Power Button
Problem Description
Power connector not installed properly.
Troubleshooting Steps Re-seat the 2x2 power connector from the power
supply unit.
LED
Power Button
Problem Description Possible peripheral card or system board failure has
occurred.
Troubleshooting
Steps
Remove all peripheral cards from the PCI and PCI-E
slots and re-start the computer. If the computer boots,
add the peripheral cards back one by one until you find
the bad one.
LED
Power Button
Problem Description
A possible system board failure has occurred.
Troubleshooting
Steps
• Disconnect all internal and external peripherals,
and re-start the computer. If the computer boots,
add the peripheral cards back one by one until you
find the bad one.
72
Summary of Contents for OptiPlex 390 Mini-Tower
Page 1: ...Dell OptiPlex 390 Mini Tower Owner s Manual Regulatory Model D12M Regulatory Type D12M001 ...
Page 6: ...6 ...
Page 10: ...10 ...
Page 12: ...12 ...
Page 18: ...18 ...
Page 32: ...32 ...
Page 38: ...38 ...
Page 46: ...46 ...
Page 50: ...50 ...
Page 52: ...7 Remove the screws that secure the system board to the computer 52 ...
Page 53: ...8 Slide the system board towards the front of the computer 53 ...
Page 55: ...55 ...
Page 68: ...68 ...
Page 90: ...90 ...
Page 92: ......