Asus M4A78LT-M - Troubleshooting

ASUS Motherboard installation guide 27
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The system then runs the power‑on self tests or POST. While the tests are running,
the BIOS beeps.
BIOS Beep Description
One continuous beep followed by three
short beeps
No VGA detected
One continuous beep followed by two
short beeps then a pause (repeated)
No memory detected
One continuous beep followed by four
short beeps
Hardware component failure
(AMI BIOS)
Four short beeps Hardware component failure
(AWARD BIOS)
Troubleshooting
Trouble Action
• Cannot turn on the computer
• Power LED is not lit.
• Power supply fan is not
working.
Ensure the power cord is connected correctly.
The computer is on but the
monitor is black.
• Ensure the monitor power is on and the VGA cable is
connected correctly.
• Adjust the monitor brightness and contrast.
• Shut down the computer and remove the power cord.

No memory detected • Ensure the memory module is correct.

socket.
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list. Refer to the user guide for the QVL.
Floppy Error
(The indicator is always lit or
a warning message pops on
the screen.)
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
correctly.
Hard/optical disk drive error
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• Ensure the jumper setting is correct. (Master/Slave)
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drive.

• Ensure the device drivers are installed.