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Thread: SK22 weird shutdown problem




  1. #1
    Join Date
    Sep 2007
    Posts
    7

    Default SK22 weird shutdown problem

    Hi All,

    Hope somebody can shed some light on my problem!

    I'm having a few problems with some SK22G2's which my company has purchased. They aren't exactly high spec units, AMD Sempron 3000, 256Meg memory, using NVidia 7100GS PCI-E gfx card and XP Home. BIOS revision is REV N or later.

    After about 1 hour the pc is powering itself down, which is due to the BIOS thinking the CPU is overheating. Quickly removing the fan & heatsink & feeling the processor reveals that it is barely warm.

    I've tried re-greasing the cpu using the supplied sachet of grease, and also with some of the more expensive silver based compound, with the same results..

    Any ideas would be appreciated!

    Antwist.

  2. #2

    Default Re: SK22 weird shutdown problem

    Are you able to power the system back up after the PC shuts itself down?
    Could you also check inside the system and the board is clean from dust.
    Eric
    SHUTTLE Technical Support

  3. #3
    Join Date
    Sep 2007
    Posts
    7

    Default Re: SK22 weird shutdown problem

    Hi Eric,

    Once it has shut down, pressing the power button on the front of the case does not power the pc up.

    The only way we can power up the system again is by unplugging the mains power cord, waiting 10 seconds to discharge residual power & then re-inserting power cord.

    Most of the systems are virtually brand new (less than 1 month old) & are perfectly clean, although i have also blown any dust out using an air duster.

    Initially the problem was helped by updating from the early Rev K BIOS to Rev N, but we are now getting problems even with the Rev N BIOS installed.

    Best regards,

    Antwist.

  4. #4
    Join Date
    Sep 2007
    Posts
    17

    Default Re: SK22 weird shutdown problem

    Hi,
    I've been searching for someone with similar problems, in the hope that someone has some answers!
    We've recently purchased 90 of the SK22g20-Ltth00-21 PC's, and have a number that we've called blowers! Sometimes when you switch on the orange (left most) light on the front panel(HDD light) stays on, the bios screen never appears and the fan switches to high speed mode and stays on. If we are lucky we can disconnect the power cord, leave it for a minute, then reconnect the power cord and switch on-it occasionally works. We have reflashed all to the latest flash bios sk22s20t, and have tried all sorts of bios settings with no real measure of success!
    The processor used is an athlon X2 3800, memory 1G DDR2, the same in every PC.
    Please help as it's extremely frustrating for us and users alike.

    Many Thanks!

    Dave.

  5. #5
    Join Date
    Sep 2007
    Posts
    17

    Default Re: SK22 weird shutdown problem

    Hi,
    Further to my last post I've downloaded speedfan and installed it on one of the "Blowers" that as started working again(for how long I don't know!).
    Speedfan shows the internal temp at 95C, and Temp2 at -55C.
    The Internal Temp is taken from an ADT7475, via SMBUS using address $2E,
    the Temp2 is taken from IT8712F-J , via ISA bus using address $290.
    I'm going to dig out one of our known good SK22's to check the temperatures on that one.
    BTW, I've used an infrared, non contact thermometer and cannot find any component above 40C (just by scanning the beam across the motherboard).
    Hope this helps,
    Dave.

  6. #6
    Join Date
    Sep 2007
    Posts
    7

    Default Re: SK22 weird shutdown problem

    Hi Dave,

    Sounds pretty similar to what we are experiencing. (my company has orders for 1100 SK22's, and so far have taken delivery of about 400).

    We have seen some of the faults that you report, and the best way we have found to get round them is to unplug any PATA / SATA devices, reset the BIOS via the small button at the rear of the case & load defaults. Also beware of any cards plugged into the PCI slot riding out of the slot, this causes the BIOS to lose its settings.


    With regard to temperature problems, I have found a link on the AMD website that points to a error in the Sempron / Athlon / Turion range of processors. Check the link: http://www.amd.com/us-en/assets/cont...docs/33610.pdf

    Specifially page 32. (Table on Page 11 shows which cpu range it refers to).

    What I would like to know is, does the SK22 use the workaround suggested by AMD, or does it use HTC/STC??

    Best regards,

    Antwist.

  7. #7

    Default Re: SK22 weird shutdown problem

    As Antwist has pointed out, there's known issues with AMD CPUs,
    so maybe you chould swap for another CPU and see if the problem is solved.
    Eric
    SHUTTLE Technical Support

  8. #8
    Join Date
    Sep 2007
    Posts
    7

    Default Re: SK22 weird shutdown problem

    The errata sheet indicates that it is a known issue with all processors in the NPT OFh family of processors.

    I am trying to find out from AMD, whether they have fixed the problem, and if they have, which processor / speed grade it applies to.

    I will post any answers when I have them.

    Antwist.

  9. #9
    Join Date
    Sep 2007
    Posts
    17

    Default Re: SK22 weird shutdown problem

    Hi Guys,
    Thanks for the info, it gives me another insight into the problem!
    Eric could you check and find out which method is used to control shutdown, if Shuttle are using the potentially buggy(due to CPU) method, is it possible to escalate the problem at Shuttle so a new BIOS flash fixes the issue?
    We do not have an alternative CPU to check out the theory. As far as I know all CPU's are of the type:-
    Althlon X2's
    AD03800IAA5CZ

    But I would need to check to confirm that supposition.
    So far we've had approx 10% that have exhibited the fault, and no easy way of checking how many may potentially be affected. I'd certainly hold off buying 1100 of them Antwist, until Eric can clarify the situation for us.
    Many thanks for all your help,

    Dave.

  10. #10

    Default Re: SK22 weird shutdown problem

    I can try check for you, but I think its highly unlikely that we will be able to
    fix the CPU issue with an BIOS update. Don't suppose you could return those
    AMD CPUs for a new batch?
    Can you check with XPC tools or other softwares the temperatures on your faulty machines and also your working ones.
    Let me check and get back to you on the BIOS update.
    Last edited by SHUTTLE - Eric Wang; 09-22-2007 at 08:52 AM.
    Eric
    SHUTTLE Technical Support

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