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Asus ROG Ally - Super IO Chip replacement

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    #1

    Asus ROG Ally - Super IO Chip replacement

    Hello everyone,
    anyone here who has experience with replacing the super IO chip of an ROG ally?
    I have one on my bench which has a burnt super io (ITE 5125VG-192). On some devices the super-io downloads it's firmware from BIOS if it's empty. As i don't have a programmer for this chips i hope someone here has already changed the chip and can give me a hint if it's working with an empty chip if it needs external programming.
    Thanks
    Ongo
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    #2
    a small update: I ordered a new, pressumably empty EC chip. After desoldering the old one, the problem (1.8ohm short on a cap near ec chip and 3.3v ldo line only providing 2.7V) went away. so I'm pretty confident that the old ec chip was burnt and was the problem.
    however, after soldering the new ec chip nothing happens. meter shows solid 20V with 0A current consumption. On the board, only the 3.3V ldo seems to be active, with a derived 1.8V for powering the Bios. Coils look fine ohms-wise, no suspicios shorts.
    any ideas where to look next?

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      #3
      Yes, i've replaced IT5125VG on asus ROG motherboard and it doesnt needs programming. It will program itself orst power on. Soldering this type of SIO requires good skill.A slightly higher temp on hot air gun may damage the SIO.
      Aligning it perfectly on the mb is another challenge. Are you sure you soldered it correctly and no pcb trace was damaged during cleaning?

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        #4
        Thanks for the heads-up mcpisig123. I hadn't had a problem with soldering BGAs for ages but i took your advise serious. just desoldered, reballed and re-soldered the ec-chip but still no change of problem. Maybe i really am unlucky with the chip itself, that would be a bummer :-( I decided to check the bios, maybe it got faulty by the same fault that destroyed the original ec chip. I just read it and will ask the forum to check it as I have no clue what to look for when it comes to bios
        keep you posted

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          #5
          Was the SIO chip sourced from reliable vendor? A lot of fake chips has flooded the market.

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            #6
            bought it from ali express from a vendor i bought a lot of stuff from the last month/year, so I'd say it's as good as it gets

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