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AOpen Motherboard

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by bikosm 1 view

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I have an AOpen AX4BS-V motherboard. When I switch on the PC it gives a siren like noise after about 2 minutes. Nothing appears on the monitor. I have tested the following: CPU, AGP Display Card, Power Supply, RAM, flashed the BIOS but none of this works.

I need help...

6 replies

by mjd420nova

I have seen some fans turn into real screamers when they get dirty.

by ozi eagle

Hi,

Dry fan bearings, generally in the PSU - replace fan, preferrably with one with ball bearings, they're only a couple of dollars dearer.

Also give the cpu heat sink a good clean whilst you are in there.

Herb

by thechas

The siren sound is likely coming from your system speaker.

The system health monitor in the BIOS has detected a problem that could damage your CPU.

Either your CPU fan is running too slow. Or, has a defective speed sensor.

Or, the CPU voltage regulator has failed and the CPU core voltage is out of limits.

Since you have no video, my guess is the CPU core voltage. Take a look at the capacitors (round silver topped cylinders) near the CPU socket. If any of these have bulged or are leaking fluid, the motherboard needs to be replaced or repaired.

If you don't see any obvious damage to components, try a different CPU fan, and / or make sure that the CPU fan is plugged into the correct connector.

Chas

by bikosm

Hi, after changing the CPU fan the siren like noise is gone but the monitor is still blank. The LED lights are OK and the hard disk is active but the monitor remains blank with a message of check signal cable

by thechas

Do you get a beep when you turn on the system?

If so, that indicates that most of the system is alive and that you are passing the POST test.

If you do not get a beep, odds are something is hanging up the system bus.

There is a good chance that the CPU overheated and failed.

The hopeful option is that the video card or another plug-in card is slightly out of it's socket.

Shut the system down and unplug the power cord.

Wear an ESD wrist strap, or keep one hand in contact with the metal part of the case at all times.

Remove and re-seat your RAM, Video card, and other plug-in cards.

Reconnect power and see if the system now boots up.

Chas

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