HP 15-bw065 (LA-E831P) malfunction: no EC_ON signal with KB9022.
Trouble: the laptop did not turn on, there was no 19v from the key output of the charger transistors.
I replaced transistors PQB11 and PQB12 - 19v appeared.
But now KB9022 is not giving out the EC_ON 3,3v when I pressed the power button on the laptop.
KB9022 voltage:
On pins 9, 22, 33, 67, 96, 111, 125 - 3.3v.
On pins EC_ON, EC_KBRST#, PM_SLP_S3#, PM_SLP_S5#, PCH_PWROK, SPOK, SYSON, EC_RSMRST#, MAINPWON, SUSP#, VGATE - 0v.
On the legs are 0. 95VS_PWR_EN#, EC_TX/GPIO16, SUSP_LED#/GPIO19, EC_RST#, KSI0-7/GPIO30-37, BATT_TEMP, ADP_ID, EC_SMB_CK1, EC_SMB_DA1, WL_PWREN_EC#, USB_ON#, EC_ACIN, LID_SW#, ON/OFFBTN# (when the power button is pressed, the voltage drops to 0v) - 3.3v.
On pins 66 and 109(VCIN0_PH) - 2.8v.
On pins 27 - 1.5v.
On the other pins - 0v - 0.3v.
When you connect the power supply on the KB9022 EC_ON pin appears voltage 3,3v and after 3 seconds drops to 0v.
KB9022 pin unsoldered and fed 3.3v to the bus EC_ON, duty voltages appeared.
KB9022 was replaced by a new one (flashed).
What can you advise to fix this problem?
Trouble: the laptop did not turn on, there was no 19v from the key output of the charger transistors.
I replaced transistors PQB11 and PQB12 - 19v appeared.
But now KB9022 is not giving out the EC_ON 3,3v when I pressed the power button on the laptop.
KB9022 voltage:
On pins 9, 22, 33, 67, 96, 111, 125 - 3.3v.
On pins EC_ON, EC_KBRST#, PM_SLP_S3#, PM_SLP_S5#, PCH_PWROK, SPOK, SYSON, EC_RSMRST#, MAINPWON, SUSP#, VGATE - 0v.
On the legs are 0. 95VS_PWR_EN#, EC_TX/GPIO16, SUSP_LED#/GPIO19, EC_RST#, KSI0-7/GPIO30-37, BATT_TEMP, ADP_ID, EC_SMB_CK1, EC_SMB_DA1, WL_PWREN_EC#, USB_ON#, EC_ACIN, LID_SW#, ON/OFFBTN# (when the power button is pressed, the voltage drops to 0v) - 3.3v.
On pins 66 and 109(VCIN0_PH) - 2.8v.
On pins 27 - 1.5v.
On the other pins - 0v - 0.3v.
When you connect the power supply on the KB9022 EC_ON pin appears voltage 3,3v and after 3 seconds drops to 0v.
KB9022 pin unsoldered and fed 3.3v to the bus EC_ON, duty voltages appeared.
KB9022 was replaced by a new one (flashed).
What can you advise to fix this problem?
