lenovo legion 5 15ach6h Power on No Image

[isa198585]

Hi, I have here Lenovo Legion 5 15ACH6H.
Power on.
Power Light is on.
Keyboard Ligth is on.
CPU Fun is On.
CPU/GPU will normal hot.
BIOS already updated.
I found today that the BIOS battery only has 2.7V, is could that be the reason?

[mcplslg123]

Check 1.8V ALW to 1.8v VS transfer is correct or not. The most common fault on legion's is 1.8VS drops down to 0.9V-1.2V.

[isa198585]

PR1046 pin 1 and PR1043 pin 1 has 1.8V
Is that what you meant with 1.8ALW and 1.8VVS?

[mcplslg123]

You've not even mentioned the mb markings. How do i verify without knowing which board it is? Is it NM-D562?

[isa198585]

srry about that, yes sure, that is NM-D562 Rev. 3.0

[dhs6512]

isa198585 Hello. Have you any update ? My case is the same, board NM-D562 Rev:2.0

[mcplslg123]

Check all dc-dc transfer circuits
UX2/QX3/QX42/UR3