Apple A1278_820-2936-B Full Dead - Case Study

laptop not power on. Magsafe adpder green light Blink. and 16.5 voltage ok (J6900).
1.After check F6905  16.5 volt ok
2. R7020 16.5 Vin ok

After Check 3/5 V ic U7200

1. Check Pin 1 P5VS3_EN_L  -  No power
2. Check Pin 6 P3V3S5_EN_L- No Power
3 Check Pin 16  - No power
4 Check pin 3 - No power

After check U7000

1. Check R7002 - 16.5V
2. Check R7001 - 5 V
3. Check R7002 - 3.5V

1. Then Check R5410 -  No Power
2. Check L7030  - No Power Small Heating
3. After Check  Imbudence  Beeping
4. Remove L7030 And Check Imbudence.  One site give ohms other site Beeping
5. Remove   F7040       and check L7030 No beeping.
6. F7040 One site give ohms other site beep ( Pin 2 )

7. F7040 Pin 2 Site connect DC Power Supply set 1.5 V  and Give Full AMPS.  Amps Go High. But  Machins is Not Heating. But one of the are thermal camera show high Temperature. and check that place C7526  Capacitor is leak After Remove capcitor. Amps Come With Normal Stage. After Resolder Other Parts. Laptop Is Work