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.
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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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.Comment
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Re: Couldnt Boot Laptop HP 14-bw087tu
Hi which bios chip you would program?Comment
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Re: Couldnt Boot Laptop HP 14-bw087tu
Actually not bios chip. But the kbc chipComment
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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.Comment
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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?Comment
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Re: Couldnt Boot Laptop HP 14-bw087tu
better buy svod or rt809 for flash kbc? which have most kbc supportComment
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Re: Couldnt Boot Laptop HP 14-bw087tu
vertyanov or rt809f, which is better?Comment
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Re: Couldnt Boot Laptop HP 14-bw087tu
are you sure rt809f can program kb9027? cause it cheapest deviceComment
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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?Comment
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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 againComment
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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?Comment
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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?Comment
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Re: Couldnt Boot Laptop HP 14-bw087tu
Does the capslock on extern keyboard toggle?? Can you light up capslock?Comment
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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.Comment
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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.Comment
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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.Comment
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Re: Couldnt Boot Laptop HP 14-bw087tu
but if the kbc defective, why the ch341a programmer can read it kb902x in the software.Comment
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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 coilComment
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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 existLast edited by ndarjo21; 01-26-2022, 12:08 PM.Comment
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I would like to see if anyone could help me salvage a very expensive laptop that is no longer working.
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Hi,
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So checked the schematics to bypass this issue.
Found something but I don't know how to read this schematics.
Dell 3537 mobo 9982p rev 3
Schematics attached,... -
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