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Recent content by 2informaticos
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A2681 820-02536 no power
Any history available? What about M/SPMU LDOs? I don't see any mention about PPBUS_AON and 3V8_AON...- 2informaticos
- Post #2
- Forum: Macbook Logic Board Repair Questions
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820-00165 green light, fan spins, CPU warm, no boot
Then bad PCH/CPU. Just in case, reflow it for test...- 2informaticos
- Post #8
- Forum: Macbook Logic Board Repair Questions
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820-00165 green light, fan spins, CPU warm, no boot
Check all SPI Bus Termination resistors and their traces. Clean J6100.- 2informaticos
- Post #6
- Forum: Macbook Logic Board Repair Questions
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A3113 / 820-03285 liquid damaged
First of all, welcome to the forum! Post resistance (ohm scale) over C5220/60.- 2informaticos
- Post #2
- Forum: Macbook Logic Board Repair Questions
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820-00923 - touchbar maybe
Check if boots in safe mode.- 2informaticos
- Post #2
- Forum: Macbook Logic Board Repair Questions
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820-02536 no keyboard
The must be something else affected by corrosion...- 2informaticos
- Post #8
- Forum: Macbook Logic Board Repair Questions
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820-00165 green light, fan spins, CPU warm, no boot
https://drive.google.com/file/d/1mTP3wgNUbRhxvjZ8Qfo4Mq8Sg4ENmVbw/view?usp=sharing https://drive.google.com/file/d/1i5bqpxaR8b9qrkJspJSwV_sarnmctwZN/view?usp=sharing- 2informaticos
- Post #4
- Forum: Macbook Logic Board Repair Questions
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820-00165 green light, fan spins, CPU warm, no boot
Any history available? PLT_RESET_L goes high? Tried known good BIOS?- 2informaticos
- Post #2
- Forum: Macbook Logic Board Repair Questions
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820-02536 no keyboard
Did you check direct connections between JT201 and JT400? Check all JT201's power rails. Also check pins 21 & 27.- 2informaticos
- Post #6
- Forum: Macbook Logic Board Repair Questions
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A2485 MacBook Pro / 820-02100-A board / 5v .11a / Logic board failure /
Short to ground. Use voltage injection method to find the culprit. As always, start with just 1V; set amp limit to max first.- 2informaticos
- Post #6
- Forum: Macbook Logic Board Repair Questions
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Macbook A1706 820-00239
Very likely. Just in case, inject voltage there; no more than 1.2V anyway. Remove CPU heatsink first.- 2informaticos
- Post #2
- Forum: Macbook Logic Board Repair Questions
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A2779 (820-02841-05) Keyboard and Trackpad Not Recognized After Replacement
Keep the KB disconnected, until fix the TP problem. Check all circuitries from page 127. Start with SPI_TPAD series resistors, RT37x.- 2informaticos
- Post #9
- Forum: Macbook Logic Board Repair Questions
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820-03437B No Backlight
Missing EDP_BKLT_EN, or just bad Q7707?- 2informaticos
- Post #3
- Forum: Macbook Logic Board Repair Questions
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A2779 (820-02841-05) Keyboard and Trackpad Not Recognized After Replacement
You should check power and signals on JT400 with trackpad connected. Don't you have replacement TP board/flex for test? If mentioned voltage drops, replace LT400.- 2informaticos
- Post #7
- Forum: Macbook Logic Board Repair Questions
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A2779 (820-02841-05) Keyboard and Trackpad Not Recognized After Replacement
If 5V_S2_MAIN is correct, then replace LT400; a simple wire bypass is good enough.- 2informaticos
- Post #4
- Forum: Macbook Logic Board Repair Questions