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820-3437 Fan Spins, No Boot
I read through some past threads and found that I need a CH341a programmer. I have ordered one.- awbower
- Post #4
- Forum: Macbook Logic Board Repair Questions
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820-3437 Fan Spins, No Boot
Many years ago I joined the Advanced Reworks forum. Louis helped me fix a few boards there. Glad to see you guys are still fighting the good fight. Every Macbook brought back to life is one new sale taken away from Apple. This board had some liquid damage through the back near the BIOS chip...- awbower
- Post #3
- Forum: Macbook Logic Board Repair Questions
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820-3437 Fan Spins, No Boot
The fan on this MBA does not go through the normal start, stop, start, stop, start sequence. Instead, it starts for about 10 seconds, stops briefly and then spins continuously. All S_0 rails are present, but PPVVC_S0_CPU is a bit low (1.7V, should be 1.8V). PM_PCH_SYS_PWROK out of U1950 is...- awbower
- Thread
- Replies: 12
- Forum: Macbook Logic Board Repair Questions