Re: Lenovo Idepad 320-15AST - no screen on battery

On battery, when only power led is shinig, then there are these voltages values:

+5VALW, on PJ605, 5,1 V
+3VALW, PJ 602, 3,3 V
+3VL and +3VLP, PJ603 3,3 V

ALW_PWRGD, pin 9 from PU602, always 0V, even when succes boot, open drain output, position PR606 from+3VALW not used, resistance to 3VALW above 1mega ohm. Same on PU 601, seems taht board does not use this signal at all.

APUALW_PWRGD 2,9V on batt, 3V on AC

+APU_CORE, PL2202 0V, then ok

Re: Lenovo Idepad 320-15AST - no screen on battery

Thank you for your reply.
In the meantime, I found that the laptop doesn't run on battery at all, the screen goes dark, the power button is still lit and the laptop freezes when I disconnect the AC In when it's on. When I reconnect the AC power, it reboots itself (after a non-correct shutdown).

Voltages are (AC In present, batt connected, power off or on have same voltages):
1,2 8,5 V
3 3,3V
4 3,3V
5 0,3V
6 0V
7,8 GND

Voltages are (AC In disconnected, batt connected,...

Re: Lenovo Idepad 320-15AST - no screen on battery

Here are both batteries on one photo, bottom battery is old, extracted from notebook before repair.

Replacement battery:
Type: 2ICP6/55/90 (L14L2P21), 3968mAh, 7,56V

Old Battery:
Type: L16M2PB1, 4000 mAh, 7,5V

Can be source of problem in wrong battery ?...

Hi everone
I have this craptop. AMD CPU. Motherboard model: DG425/DG525/DG725 NM-B321.

After battery replace (it has wear level 96.5% - no charging at all) and screen replace it seems that this laptop is working, charging. OS installed, driver, bios updated, etc...

But it does not work on battery, it turns on, ON button led and Num Lock led are on, fan spinning after while, but not screen. It's frozen. But if I connect charger then, it starts normally after short while.

I noticed, that replace battery (it is not new, but used, wear level 45%, charging...

Re: Schematics for Lenovo Idepad 320-15AST ?

Heh, I found searching under NM-B321 was enough...

AMD CPU. Motherboard model: DG425/DG525/DG725 NM-B321. Anyone ?

Re: New Members - please post your introductions here

Hi all, I hope that I found here help for some lenovo craptop