MacBook Air A1465 2014 820-3435B no greenlight missing 5 V rail.
テキスト:
Dear friends, a friend of mine donated me a 2014 MacBook Air A1465 that just stopped working. In Apple's authorized service, the motherboard was condemned (as usual) and then the Macbook was discarded by him. I'm trying to resurrect it and take the opportunity to learn a bit about it.
I measured the primary rails and I got the following results:
ppbus_g3h = 8.55 V
pp3v42_g3h = 3.42 V
ppvrtc_g3h = 3.32 V
PP3V3_S5 = 3.32 V
PM_SLP_S3_L = 0.07 V
PM_SLP_S5_L = 0.00 V
PM_RSMRST_L = 0.04 V
PM_SLP_S4_L = 0.0 V
SMC_ADAPTER_EN = 3.39 V
PP5V_S5 = 5.0 V
PP5V_S4RS3 = pulsating between 0.0 V 5.14 V, it should be 5 V.
PP5V_S0 = also pulsating between 0.0 V 5.14 V.
The 5 V rail is intermittent and as far as I know, it's responsible for powering the CPU and that'd justify the fact that it is not power on. However, PPBUS_G3H and PP3V42_G3H are present and I don't understand why I don't have a green light on the charger.
I am a beginner on this subject and any suggestions would be very welcome.