MacBook Air A1466 820-00165 Greenlight No Power On

[platinumsteel]

Hi guys i have a Macbook Air 2015 that is giving me some stress.The board looks clean physically I will have my microscope in a few weeks to check thoroughly tho.....No fan Spin but greenlight and orange light...I have checked some of the power rails i am hoping is relevant and i have reached up to the point of PP5V_S0 is missing..Can u all please guide me further thanks.


PPBUS_G3H =12.56v

PPBUS_S5_HS_COMPUTING_ISNS = 8.56v

PPBUS_S5_HS_OTHER_ISNS = 8.56v

PPDCIN_G3H_ISOL = 14.97v

PPDCIN_G3H = 14.98v

PP3V42_G3H = 3.43v

PPVRTC_G3H = 3.319v

PP5V_S5 = 5v

PP5V_S4RS3 = 5v

PP5V_S0 = 0v missing Resistance 0.8ohms 0.002V

CPU_VCCST_PWRGD = 0v

ALL_SYS_PWRGD_R = 0v

[piernov]

Re: MacBook Air A1466 820-00165 Greenlight No Power On

If you have a short to ground on PP5V_S0 then track it down by injecting some voltage and finding the chip that gets hot.

[platinumsteel]

Re: MacBook Air A1466 820-00165 Greenlight No Power On

Yo pier you were on right on target my friend...Just before i was about to inject I was checking associated caps and resistors for short and finally noticed some corrosion on C8080 which looked dark...So i went to L4010 and it was beeping both sides....So i removed C8080 ..It came off very easily....And I checked L4010 and short was gone....Plugged in DC Jack and Fan spin and all is good..Thanks a million for your expertise my friend..A microscope is definitely needed to properly inspect boards for visual cues...Will try to get one asap..