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Couldnt Boot Laptop HP 14-bw087tu

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    #21
    Re: Couldnt Boot Laptop HP 14-bw087tu

    my ch314a and 1.8v adapter is good, i have use it to flash ic bios which have 1.8v vcc.

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      #22
      Re: Couldnt Boot Laptop HP 14-bw087tu

      i try to use 1.8v adapter, and jump the from ene adapter directly to 1.8v adapter, when i click detect, it will show ic not responding three times, and when i click detect again, it show wrong device.

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        #23
        Re: Couldnt Boot Laptop HP 14-bw087tu

        Hi which bios chip you would program?

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          #24
          Re: Couldnt Boot Laptop HP 14-bw087tu

          Actually not bios chip. But the kbc chip

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            #25
            Re: Couldnt Boot Laptop HP 14-bw087tu

            Oh i do not think you can program it with ch341a programmer you wil need svod programer , rt809 or vertyanov programmer. But you can probly buy preprogrammedkbc chips too.

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              #26
              Re: Couldnt Boot Laptop HP 14-bw087tu

              nooooo.... its too expensive... its kb9027, neo programmer not supported it? i have look in the neo programmer, there are kb902x. but i never read that kb9027 couldnt reprogrammed in ch314a, are you sure?

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                #27
                Re: Couldnt Boot Laptop HP 14-bw087tu

                better buy svod or rt809 for flash kbc? which have most kbc support

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                  #28
                  Re: Couldnt Boot Laptop HP 14-bw087tu

                  vertyanov or rt809f, which is better?

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                    #29
                    Re: Couldnt Boot Laptop HP 14-bw087tu

                    are you sure rt809f can program kb9027? cause it cheapest device

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                      #30
                      Re: Couldnt Boot Laptop HP 14-bw087tu

                      i have another laptop which is dead, the kbc is kb9029q and another one is it8685e, can rt809f flash that? or should i use vertyanov or svod?

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                        #31
                        Re: Couldnt Boot Laptop HP 14-bw087tu

                        i succesfully flash the kb9027q use ch314a programmer. i not jumper from vcc in ch314a to vcc of kbc before, so it doesnt read the kbc. but the problem still same, the R22 and 1R0 still have 0 volt. and i will trace again

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                          #32
                          Re: Couldnt Boot Laptop HP 14-bw087tu

                          I have check the voltage, S5_ON in kbc is measured, but pin 100 99 and 98 which is SPI_1.8V_ON, MAINON and SUSON is not measured. I check vcc 3 volt of kbc in L2000 is measured 3 volt, but when i check +1.8V_ECIO ,it measured 0 volt. when i trace 1.8 volt, it come from +1.8V_ROM which come from PR231 and go to PU14. in the PU14, the enable pin is pin 3 and pin 5, and that pin come from pin 100 and 99 in kbc. anyone can tell me?

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                            #33
                            Re: Couldnt Boot Laptop HP 14-bw087tu

                            i think the problem is mainon and the spi_1.8v_on, because that, the +1.8V_ECIO not detected. because that problem, PL15 and PL11 not worked. either that, the VRON pin 34 in U2000 which is enable the PL44 and PL46 measured 0 volt. How can a kbc just work in S5_ON pin?

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                              #34
                              Re: Couldnt Boot Laptop HP 14-bw087tu

                              Does the capslock on extern keyboard toggle?? Can you light up capslock?

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                                #35
                                Re: Couldnt Boot Laptop HP 14-bw087tu

                                i have check, when i connect the extern keyboard, the capslock not light up.
                                Last edited by ndarjo21; 01-25-2022, 10:52 PM.

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                                  #36
                                  Re: Couldnt Boot Laptop HP 14-bw087tu

                                  resistance
                                  PL44 R22 17 OHM
                                  PL46 R22 8.48 OHM
                                  PL15 1R0 40.7 OHM
                                  PL11 1R0 0.926k OHM

                                  it is short to ground or normal?
                                  Last edited by ndarjo21; 01-25-2022, 11:21 PM.

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                                    #37
                                    Re: Couldnt Boot Laptop HP 14-bw087tu

                                    where mainon, suson, SPI_1.8V_ON and VRON come from? it is from internal of kbc right? enable just from +3VPCU_EC and +3VPCU_KBC? if thats right, can it be the kbc is defective?
                                    Last edited by ndarjo21; 01-26-2022, 12:08 AM.

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                                      #38
                                      Re: Couldnt Boot Laptop HP 14-bw087tu

                                      but if the kbc defective, why the ch341a programmer can read it kb902x in the software.

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                                        #39
                                        Re: Couldnt Boot Laptop HP 14-bw087tu

                                        I chechk the rsmrst pin and dnbswon in kbc, it reads 3.3 volt. But when i check SUSB and SUSC, it reads 0 volt, it is normal? Or should i use oscilloscope to check the signal is exist or not. Cause i dont have oscilloscope. But i thought that the SUSB and SUSC exist, cause there are 3 and 5 voltage in the coil

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                                          #40
                                          Re: Couldnt Boot Laptop HP 14-bw087tu

                                          what if i shorted S5_ON, SPI_1.8V_ON, MAINON and SUSON can it damaged the motherboard? because S5_ON is exist
                                          Last edited by ndarjo21; 01-26-2022, 12:08 PM.

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