Dell OptiPlex 390 Owners Manual - Page 74

Beep Codes, Clear CMOS. - error code 1 3 4

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Power Button Problem Description A possible system board resource and/or hardware failure has occurred. Troubleshooting Steps • Clear CMOS. • Disconnect all internal and external peripherals, and restart the computer. If the computer boots, add the peripheral cards back one by one until you find the bad one. • If the problem persists, the system board / system board component is faulty. LED Power Button Problem Description Troubleshooting Steps Some other failure has occurred. • Ensure that the display/monitor is plugged into a discrete graphic card. • Ensure that all hard drives and optical drive cables are properly connected to the system board. • If there is an error message on the screen identifying a problem with a device ( hard drive), check the device to make sure it is functioning properly. • If the operating system is attempting to boot from a device (optical drive), check system setup to ensure the boot sequence is correct for the devices installed on your computer. Beep Codes The computer can emit a series of beeps during start-up if the display cannot show errors or problems. These series of beeps, called beep codes, identify various problems. The delay between each beep is 300 ms, the delay between 74

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Power Button
Problem Description
A possible system board resource and/or hardware
failure has occurred.
Troubleshooting
Steps
•
Clear CMOS.
•
Disconnect all internal and external peripherals,
and restart the computer. If the computer boots,
add the peripheral cards back one by one until you
find the bad one.
•
If the problem persists, the system board / system
board component is faulty.
LED
Power Button
Problem
Description
Some other failure has occurred.
Troubleshooting
Steps
•
Ensure that the display/monitor is plugged into a
discrete graphic card.
•
Ensure that all hard drives and optical drive cables
are properly connected to the system board.
•
If there is an error message on the screen identifying
a problem with a device ( hard drive), check the
device to make sure it is functioning properly.
•
If the operating system is attempting to boot from a
device (optical drive), check system setup to ensure
the boot sequence is correct for the devices installed
on your computer.
Beep Codes
The computer can emit a series of beeps during start-up if the display cannot
show errors or problems. These series of beeps, called beep codes, identify
various problems. The delay between each beep is 300 ms, the delay between
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