Question about Asrock K7S41GX Motherboard

2 Answers

Mother Will Not Post

When MB is powered on the CPU fan spins and nothing else happens.
I have placed a PCI PC Analyser card which displays the POST CODE and only displays EF.
I have removed everthing from the MB apart from the CPU and reset the BIOS but results are still the same. I have also used a different PSU.
The CPU is a AMD Athlon XP 2500 (Barton).
This is my second MB as the 1st one also gave me the same results.

Please can you help?

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  • Alan Jul 12, 2008

    Hi 8bytes,

    the MB is a ATX (20pin connector) Asrock K7S41GX.

    I am going to try another CPU and will post the results here.

  • Alan Jul 12, 2008

    OK.....I have put a AMD Athlon 1800+ and the MB has posted !

    So the CPU must be shot!

    I have checked the BIOS version and it is the latest for that MB, Version 2.80.

  • James Grady May 11, 2010

    Is the motherboard "AT" or "ATX"?



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Replacing the CPU has resolved the MB not posting.
So, from my findings the other CPU must have been faulty which was bought 2nd hand from ebaY!

Is there a way to test it?

Thanks for all advice,

Posted on Jul 14, 2008

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Your post code EF comes from EF Configuration memory error - can't find memory Derives from AMI BIOS and uses port 80h
The memory failure is normally due to the first bank of ram or a data line
Check to see if your ram is seated properly, that is make sure the ram stick is in all the way down. Your problem is your system can't find RAM

Posted on Jul 13, 2008


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Hello Arua

I would suggest you get your hands on a 4 digit post card to diagnose the problem

heres one

  • Determine defects by difference sounds coding with build-in speaker.

  • It can diagnosis the motherboard signal which show the problem of CPU, Memory, video card, etc.

  • The POST code display is made up of a dual, dot matrix hexadecimal read-out that display's Power On Self Test (POST) status codes

  • Support the power source working indicator -- +5V,+12V,+3.3V and 12V(When indicator LED is on to indicate its respective power is fine, otherwise to indicate its respective power is failure.)

  • Fully compatible with any kind motherboards which has the PCI and ISA bus slot.

  • If this solution was any help at all please press accept or ask more questions with the other button.And if you need anything else let me know, you can ask me 24/7 by clicking
    on the ask me button, I will ansver in most cases within 24hours.

    Thanks and good luck!

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    T2615 E-Machine

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    swap video card or cpu
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    When a power supply goes out the way yours did, it's going to fry the MB 99% of the time. So you're going to need a new MB. It's possible that you CPU is ok, but that could also go too. I would replace the MB first, then the CPU if that doesn't work.

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