#1 Lenovo V15-IGL NM-D201 GV452/GV552 Turn on the power LED and nothing else
przez Zemog • 21 lutego 2025, 17:29
Hello everyone!
I have a Lenovo V15-IGL with NM-D201 GV452/GV552 motherboard, which when connecting the power supply, only the Power Led turns on and does nothing else.
With the motherboard removed, without battery and nothing connected (only motherboard), when connecting the power supply the consumption is 50mA.
I have measured the voltages in the coils and all the voltages are correct and present, except PL6601 (+CPU_CORE), where the value is 0V. I have measured the resistance with respect to ground: 40 Ω
I have measured the following voltages on PU6601:
Pin 7 (VCC)... 5V
Pin 11 (VSYS) ... 13,95V
Pin 52 (VIN_CT) ... 19,80V
Pin 16 (SYSON) ... 3,34V
Pin 15 (SUSP#) ... 3,34V
Pin 36 (ALW_PGOOD) ... 3,35V
Pin 27 (SYS_PWROK) .... 3,35V
Pin 45 (+VNN) ... 1,05V
Pin 24, 37 (+1,05VS) ...1,05V
Pin 26, 28 (+1,8VALW) ... 1,8V
Pin 18,21 (+1,2VALW) ... 1,2V
Pin 20 (Gate_VIN) ... 3,35V
Pin 19 (Gate VOUT) .... 2,48V
Pin 3 (+VTT) ... 0,59V
Is the value of pin 3 (+VTT) correct?
On UE1 I have measured the following pins:
Pin 11 (VCC)... 3,34V
Pin 26,50,92,114, 121 (+3VL_EC) ... 3,3V
Pin 74 (+3VL_EC_R) .... 3,3V
Pin 97 (EC_RSMRST#) ... 3,34V
Pin 82 (SYS_PWROK) ... 3,35V
Pin 98 (ALW_PGOOD) ... 3,36V
I initially extracted the SPI Bios (UC2) to make a backup copy, but during the reading, it gave me an error. The programmer recognizes the chip, but every time I try to read it, it gives an error.
I have changed it for a new one, and the new chip, when recording the dump, at the end has given me an error on 2 occasions. The third time it was recorded correctly. After soldering everything remains the same.
I have a Lenovo V15-IGL with NM-D201 GV452/GV552 motherboard, which when connecting the power supply, only the Power Led turns on and does nothing else.
With the motherboard removed, without battery and nothing connected (only motherboard), when connecting the power supply the consumption is 50mA.
I have measured the voltages in the coils and all the voltages are correct and present, except PL6601 (+CPU_CORE), where the value is 0V. I have measured the resistance with respect to ground: 40 Ω
I have measured the following voltages on PU6601:
Pin 7 (VCC)... 5V
Pin 11 (VSYS) ... 13,95V
Pin 52 (VIN_CT) ... 19,80V
Pin 16 (SYSON) ... 3,34V
Pin 15 (SUSP#) ... 3,34V
Pin 36 (ALW_PGOOD) ... 3,35V
Pin 27 (SYS_PWROK) .... 3,35V
Pin 45 (+VNN) ... 1,05V
Pin 24, 37 (+1,05VS) ...1,05V
Pin 26, 28 (+1,8VALW) ... 1,8V
Pin 18,21 (+1,2VALW) ... 1,2V
Pin 20 (Gate_VIN) ... 3,35V
Pin 19 (Gate VOUT) .... 2,48V
Pin 3 (+VTT) ... 0,59V
Is the value of pin 3 (+VTT) correct?
On UE1 I have measured the following pins:
Pin 11 (VCC)... 3,34V
Pin 26,50,92,114, 121 (+3VL_EC) ... 3,3V
Pin 74 (+3VL_EC_R) .... 3,3V
Pin 97 (EC_RSMRST#) ... 3,34V
Pin 82 (SYS_PWROK) ... 3,35V
Pin 98 (ALW_PGOOD) ... 3,36V
I initially extracted the SPI Bios (UC2) to make a backup copy, but during the reading, it gave me an error. The programmer recognizes the chip, but every time I try to read it, it gives an error.
I have changed it for a new one, and the new chip, when recording the dump, at the end has given me an error on 2 occasions. The third time it was recorded correctly. After soldering everything remains the same.