Lenovo Yoga 530-14ikb, no charging, NM-B601

[mon2]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

Is pq316 on or off the board?

Is the battery connected or removed?

[hopkok]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

pq316 is on board, all power removed

[mon2]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

Post #17

[hopkok]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

I should remove mosfet and do measuring on motherboard pins? All power removed?

[mon2]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

yes, remove this mosfet.

Connect your battery.

Connect the power adapter. The adapter will not be able to charge the battery since this high side mosfet will be removed.

This is only a test to see if the battery is still in a conflict with the power adapter when BOTH power sources are applied to the logic board.

When you do this, who is powering the board? Is it the power adapter or the battery?

[hopkok]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

but need to put back second mosfet and resistor PR310 too, right?

[mon2]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

Which other mosfet is removed ?

From post #20, how is the board powering up with the adapter connected but mosfet is missing?

[hopkok]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

it was just sugesting to my question about ITE.

OK mosfet and resistors are back.

I connected battery (motherboard did not start), when I plug charger in, motherboard has started, there is no power consuption from power source, so running from battery and N1-0V and N2-battery voltage

[mon2]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

So it has to be the battery mosfet that is left.

Measure the voltage to ground on each pin of the battery mosfet (PQ314) with the power adapter & battery connected.

[hopkok]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

place PQ316 back before?

[mon2]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

No.

[hopkok]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

So it has to be the battery mosfet that is left.

Measure the voltage to ground on each pin of the battery mosfet (PQ314) with the power adapter & battery connected.

1,2,3 pins ->7,5V
4 ->13,5V
5,6,7,8 ->7,5V

[hopkok]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

No.

Hi, any sugestion from last measuring?

[mon2]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

Meter in resistance mode.

Measure the resistance across the removed mosfet on your work table (PQ316).

Source (1-2-3) & drain (5-6-7-8)
Source (1-2-3) & gate (4)
Gate (4) & drain (5-6-7-8)

Post each measurement. Checking for a low resistance that means the mosfet is defective.

[hopkok]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

Meter in resistance mode.

Measure the resistance across the removed mosfet on your work table (PQ316).

Source (1-2-3) & drain (5-6-7-8) -> 2Mohms
Source (1-2-3) & gate (4) -> 66 Kohms, if I change probes get 214 KOhms
Gate (4) & drain (5-6-7-8) -> 1,8 Mhoms

[mon2]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

To me, the source & gate readings are too low.

Would you have a replacement mosfet?

[hopkok]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

Yes I have, lets try?

[hopkok]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

Mosfet replaced, the same. Orange light by charger is steady, but still no charging. Gonna to try flash ITE firmware...

[mon2]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

Yes, good idea. The charger IC is configured over the smbus / I2C SDA and SCL lines. This configuration defines the battery charging profile, voltage, current, etc. So the smbus master must exist and must configure this IC.

[hopkok]

Re: Lenovo Yoga 530-14ikb, no charging, NM-B601

Yes, good idea. The charger IC is configured over the smbus / I2C SDA and SCL lines. This configuration defines the battery charging profile, voltage, current, etc. So the smbus master must exist and must configure this IC.

Hi, finally it was failing CPU/PCH