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820-1700 Battery original detect but to replace

R

raainxx

Member
Hi,
i have this Mac board 820-1700, the board work well on battery with a genuine battery but not original.
No liquid spill, the customer say, Mac don't use since 2019 when he want to use now not work. I try 2 original battery (come by apple with top case). I restore the Mac in DFU same.
R5220/21 are good : 4.7 ohm
line SCL 0.500
Line SDA : 0.500
U6950 is ok and I replace it too.
20V with 1,5A then go to 0,128A when system is launch (use 96W adapter)
can you help me please? I don't understand.
thanks
Best regards
 
Last edited:
2informaticos

2informaticos

Administrator
Staff member
Revive doesn't help many times.
Restore can fix many problems.

The original battery (from this machine) may be locked; seen few locked with just 2 cycles.
This can happen if machine always works with charger.
The battery chemistry requires some use with battery alone.

Other battery still not charging actually?
 
R

raainxx

Member
ok I restore the Mac in DFU.
I stay the Mac in charge all this night, the problem is always here, with the 2 original part.
the battery charge with the genuine battery.
AST2 problem
I think the battery is not seen by the motherboard. I change the BMU flex 3 times.
another thinks to check on the logic board?
 
2informaticos

2informaticos

Administrator
Staff member
Your posts are not cleared as expected!

"the battery charge with the genuine battery"
One battery charges, other no?
Please post accurate information.
 
2informaticos

2informaticos

Administrator
Staff member
Original means the one from this machine?
Other original also not charging?
Did you test any of these original batteries with other board?
 
R

raainxx

Member
yes I'm an IRP repair office. I have order 2 new top case with battery in GSX. but same problem with 2 battery.
I try just one on another Mac same problem after I order the second battery.
I thinks it's strange apple send 2 defectives battery but maybe possible.

no more test point to check? I try to charge the Mac this week the battery is always at 1% repair status.
thanks
 
R

raainxx

Member
ok but not work on Mac? how do you do? parallels? yesterday, I try another battery functional, the Mac work perfectly with good battery.
I think I receive bad battery by apple.
thanks
 
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