Hello, I have a MacAir 2011 A1370 BRD: 820-3024-B that doesn't turn on. It doesn't have any history of water damage. Every time I connect the magsafe (60W) to the computer it flashes green and orange very rapidly. I have taken some measurements and from what I can see the computer fails to switch to the S0 state due to a short on PP5V_S3. Please correct me if I'm wrong. I have tried to inject some voltage into this line to find the short but nothing is getting hot. I have checked the charging circuitry (U7000) and it looks ok. I don't have a good board to compare. Any ideas? Thanks!
PPBUS_G3H 8.35v (12.8v)
PPDCIN_G3H 17.06v (12.8v)
PP3V42_G3H 3.40v (3.42v)
PP5V_S5 4.80v
*PP5V_S3 0v
PP5V_S0 0.17
PP3V3_S5 3.32v
PP3V3_S3 0.24v
PP3V3_S0
PPBUS_G3H 8.35v (12.8v)
PPDCIN_G3H 17.06v (12.8v)
PP3V42_G3H 3.40v (3.42v)
PP5V_S5 4.80v
*PP5V_S3 0v
PP5V_S0 0.17
PP3V3_S5 3.32v
PP3V3_S3 0.24v
PP3V3_S0