manumathew.017
Member
My a1502 2014 model logic board is not turning on , but fan is running with full speed , no display, no chime sound, Here is the voltage details.
PPBUS_G3H - 12.75V
PP3V3_S5 - 3.350 V
PP3V42_G3H - 3.42V
PP5_S5_LDO - 5.057V
PP5V_S4 - this rail is not stable , it's coming and going every 2 sec approx. Not sure it is normal behavior or not.
I haven't measured other rails ,
could you someone please give a hint where I should start ...
PPBUS_G3H - 12.75V
PP3V3_S5 - 3.350 V
PP3V42_G3H - 3.42V
PP5_S5_LDO - 5.057V
PP5V_S4 - this rail is not stable , it's coming and going every 2 sec approx. Not sure it is normal behavior or not.
I haven't measured other rails ,
could you someone please give a hint where I should start ...