Mac Air A1466 not starting

[smic717394]

Hi guys,

I have a Mac air A1466 2015 8GB, it came dead, no light on charger, nothing. The current on the psu was about 45mah. After reflowing the SMC, not I get light on the charger, its charging the battery, cpu has 1,8V, ram vas voltage, ssd too. So when pressing the power button with the battery in the current jumps to about 1,8A, without the battery, when its off, its about 40mah, pressing the power goes to agout 500mah, cpu gets warm, ram too, but no fan spin and no image. I know its coming on because I see the current change on the psu.

The cpu has about 6,8ohm, and all other have high values, could it be the smc, or is there anything I can check

Thank you.

[mon2]

What is the voltage of PPBUS_G3H to ground? Is the voltage here stable?

[smic717394]

PPBUS_G3H with the battery connectes has 7,5v that is the battery voltage, with the battery disconnected is 8,574v measured on F7140 other voltages

P3V42: 1,2v
PP3V42: 4,4v
P3V42G3H_Boost: 9,3v
P3V42G3H_SW: 4,4v
PPVIN: 17,3V
P3V42G3H_SHDN:17,3

5V present
PCH has 1v
CPU on each of the 2 coins has 1.8v
3,3V present

CPU gets mad hot, fan not coming on, screen not coming on

[mon2]

Review this flowchart:

G3 to S3 State for Ivy Bridge Haswell and Broadwell - LogiWiki

[reformatt]

6 ohms sounds too low. What speed is the CPU? Normally at least 10 ohms or more for 1.6 or 1.8G CPU so cpu could be damaged.

[piernov]

Probably measured when warm. Better reball SMC than just reflow. Could need a replacement.