a1466 820-00165 power on

[guruji]

hello
i had a a1466 with a weird problem the laptop powers on without macos as many times you want but the moment i get into the login page and i login into the macos and then shutdown ,after shutdown it does not power on ,it can only power on when i connect the adapter or disconnect the battery and reconnect it then it works the battery is perfect no issues with it also charging is perfect.if i dont login it can power on /off innumerable times on battery.i have tried a new os also another ssd.

[piernov]

Re: a1466 820-00165 power on

Try another battery. Be aware that most random batteries on eBay/Aliexpress are garbage and may exhibit the same problem.

[guruji]

Re: a1466 820-00165 power on

changed battery with another laptop battery is fine

[piernov]

Re: a1466 820-00165 power on

Check charging circuit current sensing (resistance between pins 17/18 and between pins 27/28 of U7100)

[guruji]

Re: a1466 820-00165 power on

hi again
yes all theat is also fine as the battery charges well so i dont think any issues with the battery circuit ,but i notice something my camera does not work i get message camera not connected the chip is bcm15700a2.something to do with power management where the discharge signal. it is only the second time when i go to power on battery it does not.

[guruji]

Re: a1466 820-00165 power on

okay so i reballed the camera memory now camera is fine but i still have no power on with battery the second boot battery is fine i changed the smc also battery is charging well .Which signals i need to check for powering on from battery