Macbook pro a1502 works, but not after a power off, then power on

[Xiran]

Hello again!

I have a macbook pro a1502, which works without problems, the problem comes when I turn it off completely, and try to turn it on, the only way is to disconnect the battery and charger, I reconnect the battery and the charger, and only then does it turn on. I already reset the smc, but the fault persists

[Xiran]

I put an extra button to power on/off the macbook, because like you say, it didn't work the power button

[mon2]

Disconnect the battery. Attach only the power adapter. Meter in DC voltage mode with 20v or higher scale.

Carefully measure the voltage to ground on each pin of D7005.

Post each measurement.

[Xiran]

Thx for answer!

Tomorrow i´ll check, and post results.

[Xiran]

Disconnect the battery. Attach only the power adapter. Meter in DC voltage mode with 20v or higher scale.

Carefully measure the voltage to ground on each pin of D7005.

Post each measurement.

D7005:
Pin1: 16.58v
Pin2: 12.53v
Pin3: 16.33v

[Xiran]

Disconnect the battery. Attach only the power adapter. Meter in DC voltage mode with 20v or higher scale.

Carefully measure the voltage to ground on each pin of D7005.

Post each measurement.

D7005 with only power adapter:
Pin1: 16.58v
Pin2: 12.53v
Pin3: 16.33v

D7005 with only battery:
Pin1: 0.03v
Pin2: 12.51v
Pin3: 12.33v

[reformatt]

Have you verified the power button in the keyboard actually works? Check it on R5116 location --> SMC_ONOFF_L.

[Xiran]

I put an extra button to power on/off the macbook, because like you say, it didn't work the power button