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lenovo yoga 500 not charging

hgzy ahmd

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this problem repeated in this model
I replace battery but not fix the problem
replace charging ic bq24780 but not fix it
I flashed main bios not fix it
software like the Power Management not fix it
all measurable components are good ( mosfets - resistors - ... )
I have two notebooks with the same issue

please what's yours suggestions?
 

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Hello,
Your problem is complicated...
I think you have to find components (MOSFET, Capacitor) nearly the battery.
And try to check that, maybe one component is broken.
 
Beautiful and elegant solution. Thank You very much. Worked like a charm straight away. Found the resistor, mine was around 460 Ohm, replaced it with 10 Ohm, charging started immediately. Thank You again.
 
I have found the solution . After PD4403 have an resistor 10 ohm . my resistor was 560 OHM. and BQ 24780 dont have 20V VCC in pin 28 .
Your solution works like a charm... My resistor was 15K. After changing it, the battery is charging again. Thanks a lot!!!
 

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