Macbook A1466 No power

[dclass-pro]

Re: Macbook A1466 No power

Hi guys, I put this macbook aside and today I got an identical one! the problem is exactly the same, I've tried everything, I've also followed the link you recommended, reset smc and tried everything but the new macbook won't start, every 5/6sec it tries to start, I have 5v for a moment and then shuts down, looping endlessly. What do you advise me to do?

[mon2]

Re: Macbook A1466 No power

What is the voltage to ground of PM_BATLOW_L ?

[dclass-pro]

Re: Macbook A1466 No power

PM_BATLOW_L is 3,325V fixed

[mon2]

Re: Macbook A1466 No power

Remove all power. Meter in diode mode.

Red meter probe to ground.
Black meter probe to point to test.

Review each pin on J6100 against your logic board.

https://logi.wiki/index.php/File:820...6100_FInal.jpg

Post your measurements.

[dclass-pro]

Re: Macbook A1466 No power

My J6100 have 32pin

[mon2]

Re: Macbook A1466 No power

What is the 820-**** number of your logic board?

The connector of interest is the one that mates with the spi flash chip.

[dclass-pro]

Re: Macbook A1466 No power

820-3437-b

[mon2]

Re: Macbook A1466 No power

Is PLT_RESET_L pulsing?

[dclass-pro]

Re: Macbook A1466 No power

no, is always 0v

[mon2]

Re: Macbook A1466 No power

Remove all power. Meter in DIODE mode.

Red meter probe to ground.
Black meter probe to point to test.

Measure the DIODE reading of PLT_RESET_L.

What is the measurement ?

[dclass-pro]

Re: Macbook A1466 No power

in diode mode 0.521 is not shorted

[mon2]

Re: Macbook A1466 No power

Review the voltage to ground of each of the highlighted pins on the SPI flash device @ U6100.

[dclass-pro]

Re: Macbook A1466 No power

all 3,324V

[mon2]

Re: Macbook A1466 No power

Confirm the low resistance paths for each SPI flash interface pin between master and U6100 slave device.

[dclass-pro]

Re: Macbook A1466 No power

I already checked all resistors and they are correct

[dclass-pro]

Re: Macbook A1466 No power

I also checked the lines and there is continuity

[mon2]

Re: Macbook A1466 No power

What is the voltage to ground of SMC_RESET_L ?

[dclass-pro]

Re: Macbook A1466 No power

3.3V fixed

[mon2]

Re: Macbook A1466 No power

Check if you have U2071 onboard (SC-70 single AND gate).

If yes, measure the voltage to ground of pin 1, 2, 4, 5.

List each measurement.

[dclass-pro]

Re: Macbook A1466 No power

not have U2071 onboard