[SOLVED]820-2915 not running from AC Charger

[arnonabuurs]

Hi guys, i have a 2915 that runs on battery, green and orange light but on AC only it shows green light and no fan. Few measurement without battery:

PPBUS_G3H 12.62
PP3V42_G3H 3.469
PP5V_S5 0v
R7005 = 20 ohm
R7021 = 10ohm
R7022 = 10ohm

No short to ground on any of the U7000 pins. Any ideas?

Greetz
Arno

 

[jgraffis]

i think you need to investigate the pp5v_s5 issue.

 

[dukefawks]

Using a REAL APPLE 85W charger will usually help......

 

[arnonabuurs]

Im using original apple charger, that works with another mac.... im not that big of a noob.... but a noob nevertheless

 

[jgraffis]

you need pp5v_s5 for this machine to power on. I would inspect U7201 to make sure this chip is functioning properly( voltage in, enable signals)

 

[larossmann]

If it works on the battery then this has nothing to do with U7201 and everything to do with the SMC not telling it to turn on. What do you measure on SMC_ADAPTER_EN with battery unplugged and charger plugged in?

 

[arnonabuurs]

Reflowing SMC fixed the issue thanks guys!