Hello all,
laptop Lenovo G50-45 won't start.
I don't have an original adapter or battery.
When I connect a laboratory power supply and press the power button, the LED only flashes once, something on the motherboard clicks once, but the laptop does not start.
The board is not damaged, no defective component is visible on it.
I checked all basic coil voltages and resistances to ground (without power):
PL3 (BAT) = 1v9, 328 kΩ
PL401 (SYSTEM) = 3v35, 5.42 kΩ
PL402 (SYSTEM) = 5v, 77 kΩ
PL501 (DDR) = 0v, 583 Ω
PL601 (APU VDDIO) = 1v8, 9.55 kΩ
PL602 (APU VDD) = 0v95, 260 Ω
PL903 (APU CORE) = 0v, 337 Ω
PL904 (APU CORE NB) = 0v, 39 Ω
I checked all basic voltages on KBC (IT8586E):
Pin Pin_name Voltage
1 VSS1 0v
3 +VCCRTC 0v
4 (out) KBRST# 0v
11 +3VS 0v
12 VCOREVCC 1v8
14 (in) WRST# 3v3
18 (in) PM_SLP_S3# 0v / 3v3 (off/on)
22 (in) APU_LPC_RST# 0v
26 VSTBY1 3v3
27 VSS2 0v
35 (out) ALW_PWRGD 3v3
73 (in) ADAPTER_ID 0v
74 +3VALW_EC 3v3
76 (in) NOVO# 3v3 / 3v3 (PWRrelease/press)
77 (in) PM_SLP_S5# 0v / 3v4 (off/on)
83 (out) EC_ON 3v3
84 (out) ADAPTER_ID_ON# 3v3 / 3v3 (off/on)
86 (out) PBTN_OUT# 3v3 / 2v9 only 1 second (PWRrelease/press)
93 (out) EC_RSMRST# 0v /3v3 (off/on)
97 (out) EC_VR_ON 0v
98 (out) ACOFF 0v
107 (out) SYSON 0v
108 (in) ACIN# 0v
110 (in) ON/OFF 3v3 / 0v (PWRrelease/press)
124 (out) SUSP# 0v
128 (out) AC_PRESENT 3v5
Can you help me, please?
laptop Lenovo G50-45 won't start.
I don't have an original adapter or battery.
When I connect a laboratory power supply and press the power button, the LED only flashes once, something on the motherboard clicks once, but the laptop does not start.
The board is not damaged, no defective component is visible on it.
I checked all basic coil voltages and resistances to ground (without power):
PL3 (BAT) = 1v9, 328 kΩ
PL401 (SYSTEM) = 3v35, 5.42 kΩ
PL402 (SYSTEM) = 5v, 77 kΩ
PL501 (DDR) = 0v, 583 Ω
PL601 (APU VDDIO) = 1v8, 9.55 kΩ
PL602 (APU VDD) = 0v95, 260 Ω
PL903 (APU CORE) = 0v, 337 Ω
PL904 (APU CORE NB) = 0v, 39 Ω
I checked all basic voltages on KBC (IT8586E):
Pin Pin_name Voltage
1 VSS1 0v
3 +VCCRTC 0v
4 (out) KBRST# 0v
11 +3VS 0v
12 VCOREVCC 1v8
14 (in) WRST# 3v3
18 (in) PM_SLP_S3# 0v / 3v3 (off/on)
22 (in) APU_LPC_RST# 0v
26 VSTBY1 3v3
27 VSS2 0v
35 (out) ALW_PWRGD 3v3
73 (in) ADAPTER_ID 0v
74 +3VALW_EC 3v3
76 (in) NOVO# 3v3 / 3v3 (PWRrelease/press)
77 (in) PM_SLP_S5# 0v / 3v4 (off/on)
83 (out) EC_ON 3v3
84 (out) ADAPTER_ID_ON# 3v3 / 3v3 (off/on)
86 (out) PBTN_OUT# 3v3 / 2v9 only 1 second (PWRrelease/press)
93 (out) EC_RSMRST# 0v /3v3 (off/on)
97 (out) EC_VR_ON 0v
98 (out) ACOFF 0v
107 (out) SYSON 0v
108 (in) ACIN# 0v
110 (in) ON/OFF 3v3 / 0v (PWRrelease/press)
124 (out) SUSP# 0v
128 (out) AC_PRESENT 3v5
Can you help me, please?