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

It is currently 28 October 2025, 23:11

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

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

by daro19862 • 22 October 2025, 21:36
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

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

by Google Adsense [BOT] • 22 October 2025, 21:36

#2 Re: Lenovo legion 5 płyta NM-D562 rev. 3.0 brak 1.2V

by matic • 23 October 2025, 11:17
Hello!

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

#3 Re: Lenovo legion 5 płyta NM-D562 rev. 3.0 brak 1.2V

by daro19862 • 23 October 2025, 14:13
Orginal 20V 300W

#4 Re: Lenovo legion 5 płyta NM-D562 rev. 3.0 brak 1.2V

by matic • 24 October 2025, 08:33
Also measure the voltages to ground on pins 21, 69, 74, 109 of KBC chip.

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

by daro19862 • 24 October 2025, 14:54
21- 0V
69-0V
74-3,3V
109-3,3V

#6 Re: Lenovo legion 5 płyta NM-D562 rev. 3.0 brak 1.2V

by daro19862 • 27 October 2025, 11:30
Matic,
Do you have any other ideas?

#8 Re: Lenovo legion 5 płyta NM-D562 rev. 3.0 brak 1.2V

by matic • 27 October 2025, 12:26
@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.

#9 Re: Lenovo legion 5 płyta NM-D562 rev. 3.0 brak 1.2V

by daro19862 • 27 October 2025, 12:32
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)

#10 Re: Lenovo legion 5 płyta NM-D562 rev. 3.0 brak 1.2V

by matic • 27 October 2025, 12:37
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).

#11 Re: Lenovo legion 5 płyta NM-D562 rev. 3.0 brak 1.2V

by daro19862 • 27 October 2025, 22:34
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?

#12 Re: Lenovo legion 5 płyta NM-D562 rev. 3.0 brak 1.2V

by matic • 28 October 2025, 10:27
daro19862 wrote: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 wrote: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


#13 Re: Lenovo legion 5 płyta NM-D562 rev. 3.0 brak 1.2V

by daro19862 • 28 October 2025, 12:16
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.

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

by Google Adsense [BOT] • 28 October 2025, 12:16
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