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BIOS freeze on SG135, is this repairable?

MKR74

Hi,

My SG135 stopped working and does not boot anymore. I connected the device to a monitor and all I see is a BIOS screen with a 99 code on the bottom right.

After that nothing happens and there is no response when hitting the DEL or ESC on the keyboard. I can see green LED's lighting up inside the device, but the bios screen freezes and nothing else happens.

Is my SG135 repairable?

(it is out of the warranty period)



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  • 0

    MKR74,

    on normal computer, code 99 means that the motherboard needs to be replaced. You can try to open the box and reset the CMOS using the jumper next to the battery or remove the battery, keep the power button for 15 seconds and reinstall the battery. Of course all the operations must be performed with no power cable connected.

    If there is no battery or CMOS jumper, you need to replace the SG with a new one (maybe XG model).

    Regards

  • 0

    Hi MKR74,

    If you see code 99, the CPU is working. You must first do a factory reset. The problem may be with RAM, SSD or motherboard. RAM or SSD can be replaced. I had a similar problem with XG125 but it didn't display any code, it didn't display anything. It had a damaged CPU and had to be replaced (it was under warranty).

    Regards
    Jan

  • 0 in reply to JanSadlik

    Hi Jan,

    How do I perform a factory reset?

  • 0 in reply to MKR74

    Hi,

    You need to turn off the power. Connect monitor and keyboard. Then press the reset button on the housing and turn on the power. Keep the reset pressed for about 30 seconds similar to the video www.youtube.com/watch Then release the reset button. If the menu appears on the screen, you need to select option 2 ... If the menu does not appear, there is a major hardware problem. You can replace the RAM, disconnect the SSD and keep trying.

    Regards
    Jan

  • 0 in reply to JanSadlik

    Hi Jan,

     

    I did the reset, but I got no menu on the screen.

    RAM: I swapped the RAM from a working SG125 (4Gb) and the BIOS came up and still freezes

    HDD: I disconnected the SSD and the power of the SSD, but the BIOS came up and still freezes

  • 0 in reply to MKR74

    Hi MKR74,

    Have you tried resetting CMOS as lferrara wrote?
    If nothing helps, it is possible that there is a problem with the motherboard.

    Regards
    Jan

  • 0 in reply to JanSadlik

    Hi Jan en Iferrara,

    I did the BIOS reset (removing battery and press power button for minimum of 15 seconds), but it did not help. I also swapped RAM and SSD from another (working) SG125 and it did not help.

    I suspect you are right about the motherboard.

    Is this motherboard repairable by a normal computer shop maybe?

  • 0 in reply to lferrara

    Hi Iferrara,

     

    The strange thing is: my other SG125 shows exactly the same BIOS screen with a "99" code and instantly boots after that.

     

     

    lferrara said:

    MKR74,

    on normal computer, code 99 means that the motherboard needs to be replaced. You can try to open the box and reset the CMOS using the jumper next to the battery or remove the battery, keep the power button for 15 seconds and reinstall the battery. Of course all the operations must be performed with no power cable connected.

    If there is no battery or CMOS jumper, you need to replace the SG with a new one (maybe XG model).

    Regards

     

  • 0 in reply to MKR74

    MKR74 said:

    Is this motherboard repairable by a normal computer shop maybe?

    No. You need to buy another XG or SG HW. Finding that motherboard is impossible, as the HW is very custom.

    Regards

  • 0 in reply to MKR74

    Hi,

    Maybe the hardware is ok but the flash content on SG135 matherboard is damaged. You can try to rebuild the system from an SFOS ISO image launched from a USB stick. The installation procedure, if it starts, formats flash and SSD and installs the new SFOS. Maybe it will work, who knows ?

    Regards
    Jan