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820-2936-B Does not turn on
Magsafe connector does not turn on the led, but i have 3.46V in C5710; in U6100 pins 3 and 8 i have 0V, in U7200 pin 16 (VIN) i have 0.28V. I think i should have 12V instead that 0.28V. When i take resistences to gnd in pin16 in the same U7200 it is ok. What should i measure next?- willie
- Thread
- Replies: 8
- Forum: Macbook Logic Board Repair Questions
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820-2936-B does not turn backlight
hello have a 820-2936-B does not turn backlight, measurements have taken are: F9700 = 12v PP3V3_S0 = 3.26v PPBUS_SW_BKL = 11.94v PP5V_S0 = 4.98v PPBUS_SW_LCDBKLT_PWR = 0.04v wrong. After 30 seconds of setting up to 2.25V unstable Q9706 PIN 3 8.05v.- willie
- Thread
- Replies: 7
- Forum: Macbook Logic Board Repair Questions
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820-3115-B rare symptoms.
Hi I have a 820-3115-B with a number of problems. 1. Do not turn on only 1 time pressing the power button, touch let sustained 6 seconds to turn pro macbook. 2. You can not enter that state S3 is turned off, touch again let sustained 6 seconds to turn power button. 3. THE ASD brings me 9 errors...- willie
- Thread
- Replies: 7
- Forum: Macbook Logic Board Repair Questions
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[SOLVED]820-2879-b
Hi friends i have 820-2879-B. Led green, not power on. Voltages are measured and: PAD POWER 3.40V BIOS chip PIN 1 3.31 PIN 3 3.32 PIN 8 3.31 SMC_BC_ACOK_VCC =3.39v SYS_ONEWIRE =3.37v PP3V42_G3H_ONEWIRE =3.39v SMC_BC_ACOK = 2.50v not that other measures have to be verified. Thank you- willie
- Thread
- Replies: 8
- Forum: Macbook Logic Board Repair Questions