nameless
Member
Hey everybody
I've got an issue with 820-00138 motherboard.
It doesn't charge the new battery, had to replace as previous, was inflated.
History : a customer brought the laptop cause wasn't powering on. When opened, the battery was inflated with a lot of dusty mess all around
So I replaced the battery and cleaned all around. After a week a so the happy customer came back saying it wasn't charging( or very slow during night when not used)
So now when plugin different (original) know working magsafe chargers it blinks green. When unplug the battery the magsafe stays steady amber.
The macbook works but unable to charge.
Here some measurements i did (based on similar issue from forum) :
PPBUS_G3H on F7700 - 16.21V - without battery connected
PPBUS_G3H on F7700 - fluctuates 10.81V to 16.1V - with battery connected
SMC_CHGR_BMON - on R5423 - 0.66mV - without battery
SMC_CHGR_BMON - on R5423 - jumping from 0.66mV to 253 mV - with battery
Resistance between pins 27/28 on U7100 - 21.4 omhs
U7001 - pin 5 - 3.42V
U7001 - pin 1,2 - fluctuates from 0 up to 4V when battery and charger connected
U7100 - pin 14 - fluctuates from 0 up to 4V when battery and charger connected
U5000 - R5187 - 2.8V
U7100 was corroded (here some pics) replaced with donor board magsafe still blinking
All measurements were made with original U7100 cleaned and resoldered
Thank you for your help
Regards
I've got an issue with 820-00138 motherboard.
It doesn't charge the new battery, had to replace as previous, was inflated.
History : a customer brought the laptop cause wasn't powering on. When opened, the battery was inflated with a lot of dusty mess all around
So I replaced the battery and cleaned all around. After a week a so the happy customer came back saying it wasn't charging( or very slow during night when not used)
So now when plugin different (original) know working magsafe chargers it blinks green. When unplug the battery the magsafe stays steady amber.
The macbook works but unable to charge.
Here some measurements i did (based on similar issue from forum) :
PPBUS_G3H on F7700 - 16.21V - without battery connected
PPBUS_G3H on F7700 - fluctuates 10.81V to 16.1V - with battery connected
SMC_CHGR_BMON - on R5423 - 0.66mV - without battery
SMC_CHGR_BMON - on R5423 - jumping from 0.66mV to 253 mV - with battery
Resistance between pins 27/28 on U7100 - 21.4 omhs
U7001 - pin 5 - 3.42V
U7001 - pin 1,2 - fluctuates from 0 up to 4V when battery and charger connected
U7100 - pin 14 - fluctuates from 0 up to 4V when battery and charger connected
U5000 - R5187 - 2.8V
U7100 was corroded (here some pics) replaced with donor board magsafe still blinking
All measurements were made with original U7100 cleaned and resoldered
Thank you for your help
Regards