Question about EPoX EP-8K9A2+ Motherboard

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Hi I have a machine with an EP-8K9A2+ board which has failed. The PSU is fine so it must be on the rectification stage of the board. I have heard that the rectifier caps and regulators are a weak point with these products. I don't really want to trash the PC so any help would be appreciated. Thanks Paul

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'It doesn't mean that when the power is present and all of your system fans is moving is that your power supply is OK. If your PSU is a generic one i will give a second thought that you should test your PSU in another working unit or if you simply have a multitester you can check the terminals while the system in on and could get readings accurately without any drop in voltages.

If you are really sure that your mobo is the problem then do the following if it will work for you:

Most motherboards nowadays don't work at all if the CMOS (Complementary Metal Oxide Semiconductor) battery has emptied out or weak, remove the battery and test it with multitester, a good battery is about 3V or slightly higher, a 2V reading or below would post a serious problem on the CMOS program of the motherboard which may post a problem in booting. If you find the battery is weak replace it with a new one. If these steps doesn't work at all then you should look for other problems. Observed any bulged capacitor where the upper cover is slightly push upward and remove them if you find one using soldering iron and replace it with a new one with the same rating, but if you can't find one just try removing the motherboard from the main system unit, remove the CMOS battery and clear the CMOS for about a minute or more. You should drain any power left from the motherboard's capacitors that keep supplying the CMOS chipset. You could use an aluminum foil to shorten out all the circuits under the motherboard to drain the circuits out. Draining the circuit simply putting the system on all default position. After doing this you can now put on the CMOS battery, put back the CMOS jumper setting to default and inserting all the components for testing.

Hope it helps because most of the time it works except when the regulator IC is really a problem.

Posted on May 27, 2011

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One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect your hard drive

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your ((motherboard to your hard drive)) make sure they have a secure connection and are not faulty or just replace them they could be faulty
make sure all leads that are attached to your drives dvd\cd have secure connections and are not faulty even the electic extensions or just replace them they could be faulty a computer needs its connections to continue its cycle and have an end so any faulty leads will end up with a computer error hope this helps

Posted on May 27, 2011

  • Brian Sullivan
    Brian Sullivan May 27, 2011

    even something as small as an electrical extension or a faulty fan lead can cause this problem follow the troubleshooting procedure a computer needs all of the data and electrical current to travel through every device and to have an end to be able work properly
    a motherboard and a hard drive any leads between them will fail before your motherboard or your hard drive if its a flat ribbon 40 pin type IDE replace it this will be the first to fail check all electrical extensions make sure they are securely seated even the cd/dvd floppy drives need to have current go through make sure these drives are working also it could be a dirty graphics card clean all of the dust from your computer you could use a vacuum cleaner but whatever you use make absolutely sure there is no moisture gets to anything in your computer and before you touch anything be sure to wear an earth strap hope this helps

  • maveric483 May 27, 2011

    Thanks bronk50. I gave every thing a quick once-over but will go thru the box item for item now and check it all out. Thanks a stack for the input. I'll post the ut come as well.



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