Search results

820-4924 came in with no signs of liquid damage and no power on and no mag light. I left the board alone for 2 days while I worked on other repairs, and by the time I got to the board, I first plugged in magsafe and got a orange light. Light disappeared after a few seconds. I then removed...

Thank you for the replies. I injected 3V 2A and only could find SMC heating up. I then removed the SMC and confirmed short is now gone. PPBUS and PPVRTC are not shorted with SMC removed, so it looks like my culprit is the SMC. I have never replaced one before, but just to make sure, all I really...

820-00165 came in with no sign of damage or liquid damage with no power and no light on MagSafe Charger. PPDCIN_G3H = 16.5V PP3V42_G3H = 0.3V. Diode mode reading full short on PP3V42_G3H. Applied IPA on underside of board, injected 1.8V 1A power on PP3V42_G3H and noticed the SMC (U5000) was...

Thank you all for your quick reply. I had a feeling the pins could be the issue. I will touch up the pins to the board with some solder. If that doesn't fix it, I will then max out the working slot like you mentioned. Thanks again!

I currently have 3 Mid 2012 13' MBPu that all have 820-3115 boards with the exact same issue. The symptoms are: Random shutdowns Graphical Anomalies Before shutdown, Missing RAM Beep, even with RAM installed I have replaced RAM on all units with the no progress. Interestingly enough, I...

Just to rule out that there was not any internal issues with CD3215, I went ahead a replaced all 4. Board is still getting 2.2V on PP3V3_G3H. I then removed U7000 again and hooked up USB-C power supply and discovered that with U7000 removed, the enable Pin 10 on U6903 receives 1.5v. From my...

I thought so too when I initially measured U6930. U7000 originally was sending 5V to Pin 10 before I replaced it. Perhaps something around U7000 is putting out too much power throughout this chip.

I removed R6923 from board and measured 0.4 ohms. Schematic says R6923 is 0 ohms. I did replace all corroded components except L6900, I do not have a replacement for this inductor in stock currently. I did replace U7000 just to be sure there was no internal damage. Pin 10 on U6903 is currently...

It took a while to get back to this board, however I did receive replacement U6903 chips. After replacing the chip, the board still get 2.2v. However, if I remove R6923 at the end of this circuit, the circuit gets 3.4v on Pin 1 of R6923. My thought process is that there is something pulling down...

Thank you for your input. I will make note of the UC for the future. The other components you mentioned test out fine, so it looks like I will be ordering a replacement U6903. Is it okay for the enable pin on U6903 to be 5v? I just want to make sure U7000 isn't sending too high of a signal...

Client brought in device after device was liquid damaged. Noticed a build up of corrosion around U6903 which appears to be where PP3V3_G3H is created, and a blown Diode D6902. First thing I did was give device an ultrasonic cleaning to remove the corrosion to get a better look. After which, I...