Question about Shuttle AV40S Motherboard

1 Answer

No beeps noboot only fans spinning

I pulled my heat sink to clean dust off and no boot since

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  • dragonss Apr 19, 2008

    M/B AV40S V3.1 have a red led on and doesn't start.

    The pc was turn off by a lightning, I think the motherboard is out.

    Someone have an other idea?





    Thanks

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1 Answer

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  • Master
  • 624 Answers

Skotock, My guess is that you damaged your processor or some thermal grease (paste-like material that physically bonds your heatsink to your processor) is shorting something. Unplug your power cord, remove the heatsink and processor. Check the processor for surface cracks and bent pins. Make sure NONE of the thermal grease has oozed over the edge of the processor onto either the processor pins or the motherboard itself. This material is both thermally and electrically conductive and can cause shorts. If you don?t find anything let us know and provide us with as much details about exactly what you did and how so that we can continue to troubleshoot. If this did solve your problem please let us know and don?t forget to rate this posting.

Posted on Feb 21, 2007

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When the CPU overheats then it will shutdown (i.e. thermal overload) and won't boot up again until it has cooled down.If this is the problem is not fixed then the CPU will eventually fail.
A faulty fan causes the problem or the fan and heat sink assembly are cloggedwith dust.
Check the CPU fan to see if it spins freely, if not replace the fan. If the fan and heat sink is clogged withdust the remove the dust and make sure the vents are clear and dust free. Use acan of compressed air to do this.

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My laptop turns off every 30 min.


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This fault could be caused by a faulty fan or the fan and heat sink assembly is clogged with dust.
Check the CPU fan to see if it spins freely, if not them replace the fan.
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An overheating laptop can be caused by a faulty fan or the fan and heat sink assembly is clogged with dust.
If the CPU fan does not spin freely then replace the faulty fan. If the fan and heat sink is clogged with dust, then remove the dust and clean the fan and heat sink with a can of compressed air.

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How did you clean it?
The last one I worked on had the fins of the Heat sink totally blocked with dust. This will make the fan scream trying to push air thru the heat sink to cool the processor. If it isn't cooled it will shut down in short order.
You must BLOW it out. Use a pressurized air can. Better if you have a compressor with a nozzle.

The other issue may be the interface between the CPU and heat sink is defective. Heat sink moved or become loose.

Of course by this time the processor could be dead also.

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The fan may not be covered with dust, but did you check the heat-sink?
The heat-sink fins maybe clogged with dust.
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soks3d,
With the system shut down, unplug the power cable from the power supply. Open you're case and pull the memory from the system wait a minute than reseat the memory. Re-connect the power cable to the power supply. Try booting the system and enter the bios menu. (Pulling the memory will clear any memory resident virus). This has nothing to do with the alarm buzzer sound you heard. Typically the alarm sound is generated by the CPU. It's an audible warning that the CPU is over-heating. The CPU will shut down you're system so as not to damage the motherboard and CPU. (Suggest you check the CPU fan for dust build-up. Use canned air to help remove any build-up. You can also use a clean paint brush to help remove any dust from under each CPU fan blade.
It's also possible that the CPU fan is running far too slow and may need to be replaced.
See page 3-23 in you're user manual.
3-8. PC Health Status.

Open the link provided below for a new heat-sink and fan assembly for a socket 462;
http://www.directron.com/a4004d.html
If the CPU fan and heat-sink assembly seems clean it is also possible that the thermal grease / thermal tape between the heat-sink and CPU is too old and needs to be replaced. (Save this check for last).
Below is the link for you're motherboard;
http://www.abit.com.tw/page/en/motherboard/motherboard_detail.php?pMODEL_NAME=KV7-V&fMTYPE=Socket+A

Cheers'
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