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Asus E502M ( No 3.3V On bios Chip

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    Asus E502M ( No 3.3V On bios Chip

    Hi guys need some help on this one got an Asus E502m with All the power supplies checked out and Working but on pin 8 of the bios chip im only getting 1.8V instead of 3.3v I have asked for a schematic in the schematic section but no reply yet so i can trace it .any ideas on how to troubleshoot this one.. Thanks
    Attached Files
    Your never to old to learn

    #2
    Re: Asus E502M ( No 3.3V On bios Chip

    some Bios ICs require 1.8V instead of 3.3v.

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      #3
      Re: Asus E502M ( No 3.3V On bios Chip

      Thanks Caspain for this information. what can i check next to see why it is not booting up..
      Thanks
      Your never to old to learn

      Comment


        #4
        Re: Asus E502M ( No 3.3V On bios Chip

        Take a look at this link for what might be the proper boardview file for your board

        https://www.badcaps.net/forum/showth...ghlight=e402MA

        Also look up the BIOS chip and see what the required operating voltage is (I'm at work so cant check boardview for you, and cant read it in the photos you posted). It is probably a Windbond chip of 8M. If it requires the 3.3V then you are on the right track to chase that down.

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          #5
          Re: Asus E502M ( No 3.3V On bios Chip

          Originally posted by garrymc123 View Post
          Hi guys need some help on this one got an Asus E502m with All the power supplies checked out and Working but on pin 8 of the bios chip im only getting 1.8V instead of 3.3v I have asked for a schematic in the schematic section but no reply yet so i can trace it .any ideas on how to troubleshoot this one.. Thanks
          Probably the bios chips is W25Q64FWxx
          Good idea is read datasheet when face new IC or first time to face with mobo want to fixed
          Attached Files

          Comment


            #6
            Re: Asus E502M ( No 3.3V On bios Chip

            Yip its a W25Q64FW 1.8v so where do i go next if i have all power supplies working but still wont turn on..Thanks
            Your never to old to learn

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              #7
              Re: Asus E502M ( No 3.3V On bios Chip

              Anyone?
              Your never to old to learn

              Comment


                #8
                Re: Asus E502M ( No 3.3V On bios Chip

                Check the power sequence and test points .
                Attached Files
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