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Recent content by yelrah28

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MB AIR A2179 No Boot

I did some digging and found out these lines. They get the exact voltages after a fresh charger plug-in then about 10 seconds, they loose power. These lines are from U7800. Pp0v9 slpddr 0v Pp1v2 awake 0v Pp1v8 awake 0v Pp3v3 awake 0v Ppvddcpusram awake 0v I did these test because I suspect...
- yelrah28
- Post #4
- Yesterday at 5:48 AM
- Forum: Macbook Logic Board Repair Questions
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MB AIR A2179 No Boot

Hi @2informaticos Customer reports the device suddenly stopped working and won't power on. Voltage Readings: L7400: 0.1V L7230, L7220, L7210, L8410, L8100: No voltage L7030: 12V L7690: 3.3V L7670: 5V
- yelrah28
- Post #3
- Yesterday at 3:06 AM
- Forum: Macbook Logic Board Repair Questions
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MB AIR A2179 No Boot

Hi, I have a question about a MacBook Air I'm working on. It's a MacBook Air A2179 with logic board 820-01958. The logic board looks completely clean no signs of corrosion or liquid damage. The machine negotiates 20V over USB-C, and I've confirmed the presence of the main power rails: 5V 3.3V...
- yelrah28
- Thread
- Friday at 11:17 AM
- Replies: 4
- Forum: Macbook Logic Board Repair Questions

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