Lenovo Yoga 720-15ikb / LA-E552P Akku problems

[Raumpatrouille24]

Hi,

It has problems with akku charging. Sometimes the akku is not detected / detected, but no charging...
It don´t matter if old or new akku.

Someone in Ebay offers the repair - so the failure is known.
Perhaps someone knows how to fix it?

Thanks,

Florian

[mon2]

Re: Lenovo Yoga 720-15ikb / LA-E552P Akku problems

akku charging

???

[Raumpatrouille24]

Re: Lenovo Yoga 720-15ikb / LA-E552P Akku problems

battery charging

[mon2]

Re: Lenovo Yoga 720-15ikb / LA-E552P Akku problems

1) Have the original battery charger ?

2) With a known good battery ?

3) Start with checking the voltages in the first 2 mosfets. Meter in DC mode (20v should be ok). Measure and post the voltages on each mosfet pin.

See attached.

[Raumpatrouille24]

Re: Lenovo Yoga 720-15ikb / LA-E552P Akku problems

Original charger, 2 original batteries. The next days i will go on testing. Thanks

Someone on Ebay offers a repair for that failure. So the problem should be nothing new.

[Raumpatrouille24]

Re: Lenovo Yoga 720-15ikb / LA-E552P Akku problems

Do you have the schmatic?

[mon2]

Re: Lenovo Yoga 720-15ikb / LA-E552P Akku problems

Yes. I believe so.

From a paid sub that cannot share the schematic files.