Help Asus X421EAYB Rev 2.0 PROCHOT# pulled to 0volts

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Carlos Simbaña
    Senior Member
    • Jun 2024
    • 51
    • Ecuador
    #1

    Help Asus X421EAYB Rev 2.0 PROCHOT# pulled to 0volts

    Hello, I need help with this laptop, which powers on and shows video, but it’s extremely slow and the fan spins at maximum speed from the very first second.
    When measuring PROCHOT#, it reads 0 volts, which limits the processor speed. I’ve been checking the charging circuit and everything seems to be fine. Additionally, I’ve already reprogrammed the main BIOS and the EC BIOS. If someone could give me a hand with whether I should replace the EC, or which signal I should measure to determine the fault, I would really appreciate it. Regards.
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 14766
      • Canada
      #2
      Which charger ic is onboard?

      Be sure to use the official OEM power rated adapter.

      Review each sensor that is most likely smbus (scl/sda) interfaced. If a sensor is missing, CPU speed will be throttled.

        Comment

        • Carlos Simbaña
          Senior Member
          • Jun 2024
          • 51
          • Ecuador
          #3
          Originally posted by mon2
          Which charger ic is onboard?

          Be sure to use the official OEM power rated adapter.

          Review each sensor that is most likely smbus (scl/sda) interfaced. If a sensor is missing, CPU speed will be throttled.
          The charger IC is a BQ24780S

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 14766
              • Canada
              #4
              Remove all power. Meter in resistance mode. Measure the resistance between the srn and the srp pins.

              What is the full path resistance?

                Comment

                • Carlos Simbaña
                  Senior Member
                  • Jun 2024
                  • 51
                  • Ecuador
                  #5
                  The resistance between SRN and SRP is 20 ohms.
                  The impedance of SRN and SRP is around 1.6 megaohms

                    Comment

                    • mon2
                      Badcaps Legend
                      • Dec 2019
                      • 14766
                      • Canada
                      #6
                      Path resistance matches the TI datasheet / reference design.

                      What is the voltage on ILIM pin?

                        Comment

                        • Carlos Simbaña
                          Senior Member
                          • Jun 2024
                          • 51
                          • Ecuador
                          #7
                          Originally posted by mon2
                          Path resistance matches the TI datasheet / reference design.

                          What is the voltage on ILIM pin?
                          The voltage of the ILIM pin is 1.16v

                            Comment

                            Previous template Next

                            Related Topics

                            Collapse
                            • Jo3nokokok
                              Prochot Ext Asus m409da
                              by Jo3nokokok
                              Can someone help me.

                              I have asus m409da or x409da amd ryzen 3 3200u

                              The problem originate from bad cooling, from start its already overheating a lot booting windows causing it to reach 100°C

                              And the fan started to fail and i kinda moded the laptop with older laptop fan, its not great but get the jobs done

                              And after some time, my relative use the laptop and last time i used it it still great but idk the specific.

                              But the person that use this laptop start telling me like the battery was starting to go bad etc2 and now i exchange the...
                              07-17-2025, 12:09 AM
                            • robante15
                              [Request] ASUS Vivobook Go 15 PROCHOT Dissable
                              by robante15
                              Hi, I have an ASUS Vivobook Go 15 E1504G (E1404GA-MB) it has a Core i3-N305 Alder Lake-N processor that is stuck at 0.4Ghz all the time, whether on charger only, battery only, or battery and charger at the same time.

                              The ThrottleStop app shows me "BD PRO", and it won't let me disable "BD PROCHOT", according to research Intel disabled the possibility of modifying "BD PROCHOT" from the system, and now it is blocked.

                              There are no diagrams of this board so I wouldn't know where to go to look for the physical problem on the board.

                              ...
                              11-09-2024, 01:58 PM
                            • Document Archive
                              ASUS VivoBook ASUS VivoBook 15 S513 FHD i5 16GB/512GB G3 SSD Notebook 15 Specification for Upgrade or Repair
                              by Document Archive
                              This specification for the ASUS VivoBook ASUS VivoBook 15 S513 FHD i5 16GB/512GB G3 SSD 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 ASUS VivoBook 15 S513 FHD i5 16GB/512GB G3 SSD boardview and ASUS VivoBook 15 S513 FHD i5 16GB/512GB G3 SSD 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...
                              09-07-2024, 02:50 AM
                            • Document Archive
                              ASUS ASUS E410MA-BV815TS 14.0 HD 1366x768 N4020 4GB 64GB with Office 365 1 Year Notebook Specification for Upgrade or Repair
                              by Document Archive
                              This specification for the ASUS ASUS E410MA-BV815TS 14.0 HD 1366x768 N4020 4GB 64GB with Office 365 1 Year 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 ASUS E410MA-BV815TS 14.0 HD 1366x768 N4020 4GB 64GB with Office 365 1 Year boardview and ASUS E410MA-BV815TS 14.0 HD 1366x768 N4020 4GB 64GB with Office 365 1 Year 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...
                              09-07-2024, 02:50 AM
                            • Document Archive
                              ASUS Chromebook ASUS Chromebook CX1100CNA-GJ0038 11" HD Celeron 4GB 64GB Chromebook CX1 Specification for Upgrade or Repair
                              by Document Archive
                              This specification for the ASUS Chromebook ASUS Chromebook CX1100CNA-GJ0038 11" HD Celeron 4GB 64GB Chromebook 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 ASUS Chromebook CX1100CNA-GJ0038 11" HD Celeron 4GB 64GB boardview and ASUS Chromebook CX1100CNA-GJ0038 11" HD Celeron 4GB 64GB 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...
                              09-07-2024, 02:50 AM
                            • Loading...
                            • No more items.
                            Working...