ASUS ROG Zephyrus GPU Mosfet repeat failure

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • MicroSMD Lab
    Senior Member
    • Sep 2018
    • 139
    • Trinidad and Tobago

    #1

    ASUS ROG Zephyrus GPU Mosfet repeat failure

    The board number is GU502DU. I repaired this a couple weeks ago and it came back with the same issue, same mosfet failed (PQH9201). I'm hoping that the GPU was spared this time.
    I used the same replacement part (purchased from Mouser) and I'm certain the soldering was done properly since it took just as much effort to remove as before. What could cause this same mosfet to fail? I'm thinking if it was unsuitable then the others would fail too. I looked for similar failures on YTube and the mosfet was replaced with AOE6930 in one instance and AOE6932 in the other but it's possible that the exact replacement was not available at the time of those repairs?
    While removing the black plastic on the opposite side of the board, PR9115 came off, a couple of the other components in the area also looked like they were suffering from "cold solder". It is part of the current sense circuit for this particular mosfet.
    Should I consider replacing the mosfet with the AOE replacememts or is it likely that this resistor contributed to the repeat failure of this mosfet?
  • Gcs_rma
    Banned
    • Dec 2023
    • 108
    • N/A

    #2
    Originally posted by MicroSMD Lab
    The board number is GU502DU. I repaired this a couple weeks ago and it came back with the same issue, same mosfet failed (PQH9201). I'm hoping that the GPU was spared this time.
    I used the same replacement part (purchased from Mouser) and I'm certain the soldering was done properly since it took just as much effort to remove as before. What could cause this same mosfet to fail? I'm thinking if it was unsuitable then the others would fail too. I looked for similar failures on YTube and the mosfet was replaced with AOE6930 in one instance and AOE6932 in the other but it's possible that the exact replacement was not available at the time of those repairs?
    While removing the black plastic on the opposite side of the board, PR9115 came off, a couple of the other components in the area also looked like they were suffering from "cold solder". It is part of the current sense circuit for this particular mosfet.
    Should I consider replacing the mosfet with the AOE replacememts or is it likely that this resistor contributed to the repeat failure of this mosfet?
    PQH9201 IS DUAN N-MOSFET FDPC5018SG

    Comment

    • MicroSMD Lab
      Senior Member
      • Sep 2018
      • 139
      • Trinidad and Tobago

      #3
      Sorry, I forgot to mention that FDPC5018SG is the mosfet I bought from Mouser which failed after very little use.

      Comment

      • mon2
        Badcaps Legend
        • Dec 2019
        • 14027
        • Canada

        #4
        The current sense circuit is a must to allow for the power rail regulator to gauge or throttle the power being delivered and / or being consumed by the load. This is the feedback to determine if all is well and to prevent downstream damage. The current sense circuit should be rebuilt. Flux and apply it and then cleanup the flux mess with ipa (alcohol).

        Comment

        • piernov
          Super Moderator
          • Jan 2016
          • 4435
          • France

          #5
          As always MOSFET driver must be replaced at the same time as the MOSFET, and gate/bootstrap resistors must be checked.
          OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

          Comment

          • MicroSMD Lab
            Senior Member
            • Sep 2018
            • 139
            • Trinidad and Tobago

            #6
            Thanks for the good advice as usual mon2 and piernov . The driver is TPS53603ADRGR which seems to be available from China only. Can you advise of any suitable replacements?

            Comment

            Related Topics

            Collapse

            • AppleLover123
              Asus X712EA 3 volts after the first mosfet
              by AppleLover123
              Hey guys,

              i have a asus motherboard here and as the title says after the first mosfet (in the picture) there is nothing more than 3.15v.
              I injected 19v and max. 1 amp at the charging port and there is not voltage drop or smth. It's just taking 19v and 1 milliamp.
              Then i tried to inject 19v and max 1amp after the current sensor and there it first takes 19v and 4 milliamps and after 2 seconds it is taking nothing (no current).
              I measured on the coils on board everything seems fine. Also the main power rail is not shorted (infinite resistance).
              Now i thought something...
              12-15-2024, 07:49 AM
            • Document Archive
              ASUS ROG GU603 Notebook Zephyrus G16 Specification for Upgrade or Repair
              by Document Archive
              This specification for the ASUS ROG GU603 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the GU603 boardview and GU603 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for ASUS ROG GU603 Notebook...
              09-07-2024, 07:20 AM
            • Document Archive
              ASUS ROG GU604VY-NM001XK Notebook Zephyrus M16 Specification for Upgrade or Repair
              by Document Archive
              This specification for the ASUS ROG GU604VY-NM001XK Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the GU604VY-NM001XK boardview and GU604VY-NM001XK schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download...
              09-07-2024, 07:20 AM
            • Document Archive
              ASUS ROG GU604VI-NM049W Notebook Zephyrus M16 Specification for Upgrade or Repair
              by Document Archive
              This specification for the ASUS ROG GU604VI-NM049W Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the GU604VI-NM049W boardview and GU604VI-NM049W schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download...
              09-07-2024, 07:20 AM
            • Document Archive
              ASUS ROG GA402NJ-L4034W Notebook Zephyrus G14 Specification for Upgrade or Repair
              by Document Archive
              This specification for the ASUS ROG GA402NJ-L4034W Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the GA402NJ-L4034W boardview and GA402NJ-L4034W schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download...
              09-07-2024, 07:19 AM
            • Loading...
            • No more items.
            Working...