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I removed both R5280/81, indeed they are 2 kohm. I removed U7000, then in diode mode I still have 0.54 and 0.55V on SCL/SDA lines. When I measure resistance where R5280/81 should be, I have 10 kohm Replaced both R5280/81, voltage on pins 2 remains 0V, without U7000 So, only SMC remains to give...

Ok, yes, at pin 1 of R5280/81 I have 3.4V. I mean, pin 2 of these resistors is 0V

What is the DC voltage showed by DC voltmeter on the SCL/SDA lines of battery bus: 0V, with or without battery connected Check continuity from battery connector to R5280/81: traces are ok, continuity is 1 or 2 ohm Do you get 3V at any pin of these resistors?: no, I get 0V, the same as at the...

I confirm I don't have 3V, see attached a photo: it's just a burst of square waves every second

Yes, the board is out of the case, just with DC IN, trackpad, Mini display port and HDD on USB. Values in diode mode on a good board on SMBUS_BATT_SCL and SMBUS_BATT_SDA is 0.52V, so this seems ok PP3V42_G3H_SMBUS_SMC_BSA=3.42V also ok On the other hand, on the good board R5280 and R5281 = 2...

Hi, This board is not charging the battery (green light always present) and in OS X it says: Battery not available. If I cut DC IN, the board stops. I tried with another good battery, same issue. BATT_POS_F=12.15V SYS_DETECT_L=0V SMBUS_BATT_SCL= moving between 34 and 125mV SMBUS_BATT_SDA= moving...

Hi, I have this old board, with no WIFI. L3401 was water-damaged as well as 2 pins. I replaced it, but one of the pin is completely destroyed, and it goes directly to the processor. See photo : do you think it is possible to scrap until reaching a trace, and then solder to L3401 with a wire?

I tried one different memory module, same issue. Then I tried to install on an external SSD drive, but this time the installer window (with the choices to Restore, Install, Disk Utility) did not even appear and the computer restarted, and I finally got the grey screen : "Your computer...

Hi, This Macbook is working fine, ASD 3S144 showed no issues. I tried to install High Sierra, but the installation stopped and I came back to the initial installation menu. Then I managed to install El Capitan, it updated the BIOS during the installation. I downloaded an update from Apple, and...

Hi, This I/O board from a Macbook Pro Retina 2015 is preventing the main board to start because it's shorted on PP5V_S4. Do you have a schematic for it? I cannot find it on internet. Can I inject some voltage on PP5V_S4 to find the short?

Hi, This board boots fine, charging fine, but when charging HWMonitor displays Battery current around 253A. I checked on another working board, same result. Is this a bug with HWMonitor?

Ok, learning every day! Very good to know that I can use SMC from older boards at least for testing. I have another question about this board. As I mentioned in the first post I have PP1V2_S5_SMC_VDDC : 0V but also PPBUS_G3H : 0V. Am I correct that PPBUS_G3H : 0V is another issue not linked with...

Yesterday I watched a video from Louis, "How not to replace an SMC". He mentioned that SMCs should be taken only from donor boards, because new chips were not programed. This was 7 years ago. I bought the new SMC I used for this board on Aliexpress last year. Is it still the case that new SMC...

I have this board which works fine with one memory slot, but does the 3 beeps if I insert any memory module in the second slot. I don't know from where to start. I have read about a testing memory card which I don't have and don't plan to buy given the age of the board. What could I do?

This is the photo where the SMC should stand. There were some liquid damage, so I cleaned it but now there are stained conductive traces quite close to the soldering balls. Do you think it is manually feasible to solder an SMC here? Or there are hidden shorts when the SMC is in place and it is...

Here they are: SMC_RESET_L : 3.4V SMC_WAKE_L : 3.1 V SMC_CLK32K : 0V SMC_EXTAL : 0V SMC_XTAL : 0.4V VBAT, VDD (L5001-1) : 3.4 V PP1V2_S5_SMC_VDDC : 0V VDDA (L5001-2) : 3.4 V PP3V3_S5_AVREF_SMC : 3.3V GND_SMC_AVSS : 0V SMC_TCK : 3.4V SMC_TMS : 3.4V SMC_TDO : 3.4V SMC_TDI : 3.4V Seems OK?

With old SMC on PP1V2_S5_SMC_VDDC in diode mode I have 0.52V; with brand new one I have 0.51V. Otherwise still 0V under power

Hi, On this board, initially PP3V42_G3H and PP1V2_S5_SMC_VDDC were shorted (voltage was 2.6V then). I had to remove SMC to figure it out, which I soldered back, but still PP1V2_S5_SMC_VDDC was at 0V. So I have now: PP3V42_G3H : 3.4V PPBUS_G3H : 0V PP1V2_S5_SMC_VDDC : 0V PP3V3_S5_SMC_VDDA ...

I removed F7140, same voltage on C7140 I replaced Q7180 from a donor board, same voltage I replaced ISL6259A also from a donor board, and now I finally have 12.6V. Thanks for the help I have a question about ISL9259: can ISL6259 AHRTZ be replaced with ISL6259 HRTZ, for example from 820-3115...

U7100, D7105 removed. pin 2: 0V R=22.2 ohm pin 19: 0.33V R= 65kohm pin 20: 0.33V R= 65kohm I removed R7105, pin 2: 3.1 V But then on pin 1 of R7105/pin 3 of D7105 (CHGR_DCIN_D_R), I had again 0V, 2.2 ohm. The boardview shows a link to R7192, and finally it was C7190 shorted! I replaced...