Lenovo legion 5 płyta NM-D562 rev. 3.0 brak 1.2V

Mam podobny problem jak w tym temacie:
post292668.html
wszystkie pomiary do ostatniego postu takie same, nie próbowałem przeprogramować ITE.
kontynuuje pomiary na KBC:
12- 1,8V
18- 0V
26- 3,3V
70- 3V
83- 0V
93- 1,7V
108- 3,1V
119- 0V
123- 3,3V
124 -0V
128- 3,3V

86- 3,3V jak nacisnę power to spada do 0V i jak puszczę power zostaje na 0V
110- 3,3V jak nacisnę power to spada do 0V jak puszczę to wraca do 3,3V

Hello!

What is the rated power of the charger you are using?

Orginal 20V 300W

Also measure the voltages to ground on pins 21, 69, 74, 109 of KBC chip.

21- 0V
69-0V
74-3,3V
109-3,3V

Matic,
Do you have any other ideas?

Measure the voltages on pins 93, 108, 123 of KBC.
Measure the voltages on pins 86, 110 of the KBC in the following cases:
at power off
with power on pressed
at power on.

@Machine - All of these measurements are in post #1.

The measurements show that the communication between the KBC chip and the APU processor is missing.
One of the chips - the KBC or APU processor is very likely damaged. In my experience most likely APU.

93- 1,7V
108- 3,1V
123- 3,3V
at power off:
86 - 3,3V
110- 3,3V
with power on pressed
86 - 0V
110- 0V
at power on.
86 - 3,3V
110- 0V (not back to 3, 3V)

Check if 1.8V is present on pin 8 of the BIOS chip UB3. If so, try to reflash the BIOS chip (if you haven't done so already).

1,8V is avible on BIOS i flash many version BIOS and same efect.
I try reprogram EC but but it makes no sense because when the EC power supply is connected, it will program itself from the BIOS.
I try program EC when BIOS is desolder but all .bin 192kb and 256kb work same when press power on not have 1,2V on RAM.
Pin 110 on KBC after power on have 0V and some mosfet shorts to ground this signal i dont know where does this EC or APU signal come from?

daro19862 hat geschrieben:Pin 110 on KBC after power on have 0V and some mosfet shorts to ground this signal i dont know where does this EC or APU signal come from?

But in the post #1 you stated differently that the pin 86 does not go back to 3V:

daro19862 hat geschrieben:86- 3,3V jak nacisnę power to spada do 0V i jak puszczę power zostaje na 0V
110- 3,3V jak nacisnę power to spada do 0V jak puszczę to wraca do 3,3V

I confused pin 86 with pin 110.
pin 86 does not go back to 3V
pin 110 work fine his back to 3,3V when relase power.

This signal is generated by the KBC chip. Open (cut) the jumper RC218 and remeasure the voltage to ground on pin 86 of the KBC chip.

Reballing cpu załatwi sprawe