I have laptop Lenovo IdeaPad 3 15ITL6 with Intel Core i3-1115G4. When I press the start button, LED light on the start button starts blinking 12 times, then stops and after some time starts blinking 12 times again. When it stops, all voltages are down.
The motherboard is HS460 HS560 HS760 NM-D471 Rev: 2.0
S/N: PF3Q0WTF
The motherboard is not mine, also there were corrosion on the board which I cleaned.
Methods of fixing like fully turning off the motherboard or starting only with adapter doesn't work. All testing were did only with adapter on.
The motherboard schematics I found here:
https://drive.google.com/drive/folde...2_Tr5DdPC5M_jd
What I found and did:
There's no shortcut on main voltages like memory power, CPU power and other (resistances are all good)
There are present 3.3VALW, 5VALW, 1.8VALW, 1.05V Bypass.
RSMRST# is high.
Reprogramed BIOS SPI flashes(there are 2 SPI flashes).
When I power on the motherboard, chip select on SPI flashes goes high, for a moment drops to low and goes high again. And the input/output either copy the chip select behavior, or doesn't go high at all. If I press the power button, there are no changes in voltages around SPI flashes.
The current when I power on the motherboard is 50mA. Doesn't change when I press the start button.
When I press the start button, neither SLP_S5#, nor SLP_S4#, nor SLP_S3# go high.
I tried to describe the situation in a short version. If you need any more information, please ask.
The motherboard is HS460 HS560 HS760 NM-D471 Rev: 2.0
S/N: PF3Q0WTF
The motherboard is not mine, also there were corrosion on the board which I cleaned.
Methods of fixing like fully turning off the motherboard or starting only with adapter doesn't work. All testing were did only with adapter on.
The motherboard schematics I found here:
https://drive.google.com/drive/folde...2_Tr5DdPC5M_jd
What I found and did:
There's no shortcut on main voltages like memory power, CPU power and other (resistances are all good)
There are present 3.3VALW, 5VALW, 1.8VALW, 1.05V Bypass.
RSMRST# is high.
Reprogramed BIOS SPI flashes(there are 2 SPI flashes).
When I power on the motherboard, chip select on SPI flashes goes high, for a moment drops to low and goes high again. And the input/output either copy the chip select behavior, or doesn't go high at all. If I press the power button, there are no changes in voltages around SPI flashes.
The current when I power on the motherboard is 50mA. Doesn't change when I press the start button.
When I press the start button, neither SLP_S5#, nor SLP_S4#, nor SLP_S3# go high.
I tried to describe the situation in a short version. If you need any more information, please ask.