Hey guys, this one is really throwing me for a loop --
Came in with history of customer ultrasonically cleaning it, also with the note of "Magsafe sparked when plugged in"
Went through the rails --
All rails present except PP5v_S0
PP3v3_S0 is present.
U7500 and Q7511/10 had some residue and U7500 and a red probe point (PP5v_S0_MCPREG_VCC) . Replaced U7500 and Q7511. Still nothing.
Pp5V RT_S0_BOOT present
PP5v_RT_LGATE missing
PP5v_RT_PHASE missing
PP5v_RT_S0_UGATE missing
EN, VCC, and VIN present to U7500
This is not a C7771 issue as well.
If I supply 5v to 5v S0 vcore is present and drops to .99 indicating post.
Came in with history of customer ultrasonically cleaning it, also with the note of "Magsafe sparked when plugged in"
Went through the rails --
All rails present except PP5v_S0
PP3v3_S0 is present.
U7500 and Q7511/10 had some residue and U7500 and a red probe point (PP5v_S0_MCPREG_VCC) . Replaced U7500 and Q7511. Still nothing.
Pp5V RT_S0_BOOT present
PP5v_RT_LGATE missing
PP5v_RT_PHASE missing
PP5v_RT_S0_UGATE missing
EN, VCC, and VIN present to U7500
This is not a C7771 issue as well.
If I supply 5v to 5v S0 vcore is present and drops to .99 indicating post.