HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
RSMRST# is missing on pin 95 of KBC. What is the resistance on this pin?Comment
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
CH34A cant program this type of Ec. You need SVOD or similar programmer specially made for kbc programming.Comment
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
Never seen resistance of 1M ohms on RSMRST# pin. Are you sure about your measurements?Comment
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
3V_RTC is 3.01VLast edited by Jmine; 03-23-2023, 01:53 AM.Comment
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
Quanta boards unfortunately don't often have power sequence diagrams in their schematics. Pretty sure S5_ON assertion doesn't occur till after NBSWON1# goes low from the power button press. RSMRST#/EC_PWROK on other Quanta boards where there is a power sequence don't occur till after S5_ON is asserted.
AFAIK, KBC_RST# should be high in G3 to S5 transition, and this is controlled by the FCH. According to the Boston FCH datasheet:
On G3 to S5 transition, the BIOS will not be able to program this pin as Gevent1#. If the pin is used as Gevent1#, the design should ensure that the pin remains in logical high during the G3--> S5 --> S0 transition.
So you need to look at the FCH if KBC_RST# is being held low. First thing to check is for a valid 32khz RTC signal to the FCH.Comment
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
KBC_RST# is used to reset the LPC interface here for communication between FCH and EC.
KBC_RST# connects to PCIRST# which should be used at the end of power sequence, it's probably only powered in S0.OpenBoardView — https://github.com/OpenBoardView/OpenBoardViewComment
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