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Corrosion I have not seen yet on the motherboard, But if anything on Magsafe Dc In Jack Power Board Cable 820-2565-a I see signs of corrosion and a burnt transistor. I have tried with another Magsafe Dc In Jack Power Board Cable 820-2565-a. Do you mean SMC_BC_ACOK pin 14? Not present. Do you...

C3880 pin 1 0.20v

Do you mean PPBUS_G3H?

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?

No Title if you have the screen image. what it is the backlight turns on the screen.

I think if it was liquid but long ago! I do not see traces of moisture, C5025 I drew was something sulfated on pin 1, but have inspected well the board and see no sulfate or something stranger.

No Title Certeinly C5025 had a short. Multimeter showed a resistence to GND 0.02Ohms. I extracted the C5025 and the shorte disappeared, so the MacBook Pro turned on. I did the ADS and the error sensors desappeared, it's all OK. Then, the machine was turned on and working, but 20 minutes later...

there is a problem here. In Q9707 pin 2 2.29v pin 6 0.95V pin 4 0v (pin 5 0v LCD_BKLT_EN) pin 3 8.52v.

Sorry Q9706 PIN 1: 0.02v 30 sec Powering unstable. 1.82v PIN 3: 8.05V 30 sec Powering unstable. 12.7V PIN 4: 12V.

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.

PP3V3_S5_AVREF_SMC = 0.07v on C4920 I do not see traces of moisture or sulphate NOTE: Only turn on with the battery connected. I went to measure care AVREF_SMC is behind the board, trying to turn the power pad note that ignites only if, if the battery is connected.

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...

No Title I think to buy them in the same forum there is a section for business, open a thread, if not on aliexpress or maybe ebay.

No Title 1230kOhm are the measures. I have seen that the coil L7260 has a very low resistance 006Ohm to GND, retirement coil and short appears on pin 1 of L7260. inject voltage and heated c6213, c6213 extract the all good! Thans for you time! dukefawks:D

what you want is that i check impedance between GND and PP3V42, right? The multimeter show 1230 But i don't have clear about the crystal Y2810, are we talking abouyt impedance too? it both pins repect to GND the impedance is 1368

i did it both ways .

disconnect a pin of PL4502, and where it will go for the short, or remove TPS51285ARUKR-GP. to remove the short is.

f7040 12.5v l7220 3.31v

hi friend, laboratory power supply use?. check out these tensions: PU4201, PL4501 or PL4502