Motherboard / Chip-Level · Satellite · 2026-09-15
Apple MacBook Air (A1466) — Motherboard Short Circuit in Satellite, Ahmedabad
Quick answer
Apple MacBook Air (A1466) (legacy MacBook Air (i5, 13″)) arrived with: Completely dead — no power LED, no fan spin, charger brick LED switching off when plugged in. Root cause: A failed low-side MOSFET on the 3.3V buck converter had shorted drain-to-source, pulling the rail to ground and preventing the EC from asserting the power-on sequence. Repaired at HOPE Systems Ahmedabad for ₹5,099 in 48 hours, with a 90-day warranty. Success rate for this repair category: 94%.
Device & specification
legacy MacBook Air (i5, 13″)
Reported symptom
Completely dead — no power LED, no fan spin, charger brick LED switching off when plugged in.
“It died overnight. Two shops told me the motherboard was gone and quoted a full board replacement.”
Diagnostic procedure
- Visual inspection under 40× stereo microscope
- Diode-mode measurement on main power rails with Fluke 87V-MAX
- Short located on the 3.3V rail (0.4 Ω to ground)
- Thermal camera (FLIR T330) sweep at 1.5 A injection to find the hot component
- Oscilloscope capture of PWM enable line (no switching)
Root cause analysis
A failed low-side MOSFET on the 3.3V buck converter had shorted drain-to-source, pulling the rail to ground and preventing the EC from asserting the power-on sequence.
Step-by-step repair process
- Board removed and cleaned in ultrasonic tank
- Faulty MOSFET desoldered with hot-air rework at 340°C
- Replacement MOSFET (identical part number) installed and reflowed
- Rail resistance re-verified (now 14 kΩ)
- Power-on sequence verified on oscilloscope
- 4-hour burn-in with thermal monitoring
Parts replaced & costs
| Part | Cost (INR) |
|---|---|
| Power MOSFET (OEM part) | ₹450 |
| Thermal paste & pads | ₹250 |
| Total billed (parts + labour) | ₹5,099 |
Quality-control testing
- Full power-cycle test (10 cycles)
- 2-hour stress/burn-in with thermal logging
- Port, Wi-Fi, audio, camera and battery-charge verification
- Final cosmetic clean and screw-torque audit
Customer review
★★★★★
“Motherboard Short Circuit on my Apple MacBook Air (A1466) was handled honestly at HOPE Systems — clear quote before work, free pickup from Satellite, and it came back working perfectly within the promised 48 hours.”
— Sagar Chauhan, Satellite
Similar fault on your machine? See the service page or book a free diagnosis.