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Recent content by 2informaticos
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820-00165 Backlight/Image Issue
Possibly problems with LCD, or its connector.- 2informaticos
- Post #12
- Forum: Macbook Logic Board Repair Questions
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820-3115-B No Boot
CPU core should drop from 1.1V to 0.7V aprox, when board boots. There may be a communication problem between PCH, CPU and BIOS. BTW, stop checking DC voltage on any coil's input pin.- 2informaticos
- Post #6
- Forum: Macbook Logic Board Repair Questions
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820-3115-B No Power
Post U7200 basic voltages: pins 16, 3, 8, 17, 1, 6.- 2informaticos
- Post #6
- Forum: Macbook Logic Board Repair Questions
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820-2879 works on battery but not on adapter
Post U7000 basic voltages: pins 1, 2, 3, 9, 12, 13, 14, 15, 17, 19, 20, 27.- 2informaticos
- Post #10
- Forum: Macbook Logic Board Repair Questions
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820-3115-B board only works on SMC bypass mode
"SMC_DCIN_ISENSE- 0.73v" This looks very high! Check resistance (ohm scale) over C7020. R7021/2 are the first suspects.- 2informaticos
- Post #4
- Forum: Macbook Logic Board Repair Questions
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820-2523 boots but no image
MCP also fails after so many years. Refllow is not a solution for these old boards. You can probably find working one very cheap.- 2informaticos
- Post #5
- Forum: Macbook Logic Board Repair Questions
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820-00165 Backlight/Image Issue
DP_INT_HPD must go high at same time; if LCD is connected, of course. Be sure R8360 is good.- 2informaticos
- Post #10
- Forum: Macbook Logic Board Repair Questions
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820-02020 don't switch off lcd when closed
Check the traces to UR200; if both inputs are low (0V), output must go low too.- 2informaticos
- Post #9
- Forum: Macbook Logic Board Repair Questions
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MB AIR A2179 No Boot
First of all, welcome to the forum! Any history available? What said the customer about the failure appearance? Which big coils get voltage?- 2informaticos
- Post #2
- Forum: Macbook Logic Board Repair Questions
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Macbook A2485 Drawing 5V No Amps
If has the same pinout, you can try...- 2informaticos
- Post #8
- Forum: Macbook Logic Board Repair Questions
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820-3115-B No Boot
Which big coils get voltage?- 2informaticos
- Post #4
- Forum: Macbook Logic Board Repair Questions
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820-3115-B No Power
Post U5010 voltages.- 2informaticos
- Post #4
- Forum: Macbook Logic Board Repair Questions
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820-2879 works on battery but not on adapter
What about PPBUS_G3H and 3V42_G3H voltages, with fake charger?- 2informaticos
- Post #8
- Forum: Macbook Logic Board Repair Questions
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820-3115-B board only works on SMC bypass mode
Be sure R7402/3 have correct ohm values. Also check their solders and traces. Check SMC_DCIN/PBUS_VSENSE levels, as SMC_DCIN/BMON_ISENSE too.- 2informaticos
- Post #2
- Forum: Macbook Logic Board Repair Questions
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820-2523 boots but no image
It is very likely GPU issue...- 2informaticos
- Post #2
- Forum: Macbook Logic Board Repair Questions