Announcement

Collapse
No announcement yet.

Asus K56CB-XO488H not detect Nvidia GT740M

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Asus K56CB-XO488H not detect Nvidia GT740M

    Hello.
    I got a faulty Asus K56CB-XO488H laptop that did not turn on. The problem was the BIOS. On this forum I got a BIOS dump which I flashed to new chip.

    The laptop is working now. There is only one problem with it. The laptop has Intel HD 4000 and Nvidia GT740m. Only the Intel HD 4000 appears in Device Manager. There is no setting in the BIOS to disable it. I also tried updating the BIOS, it didn't help. The Nvidia Chip doesn't even heat up.

    Could it have to do with having a bios dump from the forum and not the original? Or need to look for the fault elsewhere?

    #2
    Re: Asus K56CB-XO488H not detect Nvidia GT740M

    Uma bios yes

    Comment


      #3
      Re: Asus K56CB-XO488H not detect Nvidia GT740M

      Originally posted by stingerchamp View Post
      Uma bios yes
      Do you know a bios dump that would be good for me to this?

      Comment


        #4
        Re: Asus K56CB-XO488H not detect Nvidia GT740M

        BIOS requests go into the BIOS request section.
        OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

        Comment


          #5
          Re: Asus K56CB-XO488H not detect Nvidia GT740M

          https://www.badcaps.net/forum/showthread.php?t=91747
          Last edited by caspian; 01-04-2021, 12:59 PM.

          Comment


            #6
            Re: Asus K56CB-XO488H not detect Nvidia GT740M

            Originally posted by piernov View Post
            BIOS requests go into the BIOS request section.
            I had an old post about this laptop there(when not power on due to bios), I also wrote there with this problem but I didn't get an answer to the graphics problem. I also wrote here because I wasn't sure this was a BIOS problem.

            If I have the BIOS flasher here, I'll give it a try. Thank you!

            Comment


              #7
              Re: Asus K56CB-XO488H not detect Nvidia GT740M

              I tried it but it still doesn't work.

              Comment


                #8
                Re: Asus K56CB-XO488H not detect Nvidia GT740M

                Could there be a similar problem? Lenovo U510 LA-8972P. Despite the display screen, the video card is not seen in the device management, PU801 GPU power control RT8813A chip no + 5v at 21 pin, 2.2 ohm protection resistor open circuit. The chip was replaced and the problem was resolved. Check the VGA_GPU voltages.

                Last edited by Sametbey; 01-09-2021, 08:48 AM. Reason: picture added
                I'm not happy to be so strong. because it's not humanly

                Comment


                  #9
                  Re: Asus K56CB-XO488H not detect Nvidia GT740M

                  I'm still a beginner in these so I don't really know what to look for.
                  There is a mosfet (Nikos P1203BV) between the processor and the NVIDIA chip. I noticed that the Drain pin is 1.05V, but the Source and Gate pin are 0V. Could this be a problem?
                  Attached Files

                  Comment


                    #10
                    Re: Asus K56CB-XO488H not detect Nvidia GT740M

                    I just noticed that a capacitor and a diode(maybe) on the other side has burned.
                    Attached Files
                    Last edited by Gripen; 01-11-2021, 11:11 AM.

                    Comment

                    Working...
                    X