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820-02536 no keyboard/trackpad

S

Sr. Robot

Member
Supposedly keyboard and trackpad stopped working after LCD replacement, but angle sensor works good and its oem.


PP3V3_S2SW_IPD_F is shorted. I am unsure as to how much voltage to inject since its first time working with this model.
 
2informaticos

2informaticos

Administrator
Staff member
Did you remove LT402 and locate the short on its pad 2?

Do not inject more than 4V ever.
Depending of the short value, 1V may be good enough.
 
S

Sr. Robot

Member
UT360 was shorted.

After replacing i get 3.3v on PP3V3_S2SW_IPD_F.

PP5V_S2_IPD_F, IPD_LID_OPEN_1V8, PPBUS_AONSW_IPD_F are present. (measured on JT400)

Still no keyboard or TP

Tried different TP flex cable, no change.
 
Last edited:
S

Sr. Robot

Member
Diode mode measurements are ok:

I2C_KBD_SCL0l
I2C_KBD_SDA0l
I2C_SMC_IPD_SCL_CONN0.500
I2C_SMC_IPD_SDA_CONN0.500
IPD_MCU_INT_CONN_L0.474
IPD_MCU_RESET_CONN_L0.679
IPD_MTP_FUNC_1_CONN0.592
IPD_SYS_AWAKE_CONN0.431
IPD_TOUCH_CLK_CONN0.000
IPD_TOUCH_INT_CONN_L0.730
IPD_TOUCH_RESET_CONN_L0.679
KBD_INT_L0l
PPBUS_AONSW_IPD_F0.168
SPI_IPD_CLK_CONN0.442
SPI_IPD_MCU_CS_CONN_L0.443
SPI_IPD_MISO_CONN0.436
SPI_IPD_MOSI_CONN0.441
SPI_IPD_TOUCH_CS_CONN_L0.400
SWD_IPD_CLK_CONN0l
SWD_IPD_DATA_CONN0l
TPAD_KBD_WAKE_CONN_L0.475
 
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