820 3476 A, No charge battery


New member

working on 820 3476 no charge! already repair this one with C7198 shorted to ground. i replace for a new one the machine comes to life but after 1 week came again!

now, with only charge the machine work's well!
with battery + charger i don't have green light and don't start!
fake charger + battery the mac turn on but don't pass 1% and indicates charging!

i compare to working board on diode mode on pin 1 & 2 D7050 and the values it's the same!

already try new battery same history!



Staff member
Seems that original charger detects some leakage on the board and gets blocked.
Can be Q7180 issue, or something around Q/D7010.
Post exact value (measured onboard, ohm scale) for R7180/81 and R7185/86.


New member
hey ,

already replace q7180 for new one no changes!

R7180/R7181 - resistance float 21k - 55k check with another working board and the values don't float! What could be wrong?

R7185/86 - 470K/330K


New member
Yes i did! i have already tried 3 new Q7180 and same history the resistence float!! i remove Q7180 of working board and i measure R7180 and i noticed that resistance don't float! i think the problem only can be on ISL6259 or the connection pin2 R7180 to the gate Q7180! But the problem is U7100. I replace and the board work's well!!

thank you one more time