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looking with thermal camera I see heartbeat on TPS51980B (U7650). is the chip faulty or something making the hearbeat happening ? I've checked all components around and couldn't find anyhting wrong. I'll keep searching.

RF101/2 is ok now. RF101/2 still shorted, that's PP3V3_S2SW_USBC1 and it's connected to a lot of capacitor and UF750 and UF115, UF740...

So the techinc is to remove one and get lucky ?

I can put it on DFU only when connected to left side. When I try from right USB-C it doesn't work. I guess it's normal. Revive keep giving same error

Hi, Macbook get 5V and stay at 0.16 - 0.40 amp. I found a short on CF131 PIN1 near UF500. It's PP0V9_ATCRTMR1_VCCA. It's connected to CF143, CF130 and RF101 and RF100. I want to make sure my diag is correct. I have .019 on diode mode, so it really looks like a short. Compare to simialr cap...

I can try again revive, you think I should ? I need the data

.359 .409 .409

thanks. 0V on the one you highligthed. I don't have an exact same board to compare. I have a 820-01700 working.

Correct, I use 01700 and board is not same on SSD area. I see those SSD power line on schematic but when I look at boardview, it's not same. PP0V9_NAND0 PP1V2_NAND0 PP2V5_NAND0 PP0V9_NAND1 PP1V2_NAND1 PP2V5_NAND1 I don't know if the pics can help. The flapping between 3,3 to 1,55 mean something?

Now that I did try "revive" it take max 0,1 amp, it's no longer going up to 0.4amp I am not too sure which SSD voltage I need to check HS_P3V3_G3W_SSD0_OUT = 0.06V HS_PBUS_MAIN_SSD0 = 0.22 V P1V8_LX0_SSD0 = 0V HS_P3V3_G3W_SSD1_OUT = 0.06V HS_PBUS_MAIN_SSD1 = 0.22 V P1V8_LX0_SSD0 = 0V

Ok, I've cleaned U4770, went to DFU. Tried revive and failed.

Anything to do ?

ok, I got the right way to access DFU with the switch. It's working on both motherboard (Bad and good). 1. Connect only power USB-C on DFU Mother board 2. Open AC2 3. Press the switch and hold it 4. connect thunderbolt USB-C to USB-C to AC2 Intel Macbook 5. DFU should appear Now I'll try a...

Hello I know this model is fragile and most of the time SSD are dead. I want to make sure I correct information to the customer. no usb activity PPVBAT_G3H_CHGR_REG 12.59V PP2V5_NAND_SSD1 2.53V (no short between 12V and 2,5 V) Near U7800 PP1V2_Awake 1.2V on C7914 PP3V0_G3H_RTC 3V on C7906...

Hi again, bad luck, Mac is no longer booting. It was booting, I would turn it off. I did that process twice and I waited for customer and now it's no longer booting. USB-C is on JE701, it stay at 5V and 0.17 amp. UF350 that manage JE701 looks ok, so it's no same issue. I've cleaned again the...

Got the right brdview, CT054 was the culprit. I remove it, Mac is working now. In such case, Is it necessary to replace the cap ?

Hello Macbook stop working all of suden. No light on Magsafe, no 20V so I took board out. No visible damage. I am using schematic 820-02100, I don't know if there is a better one available for 820-02652, nothing on badcaps. 3v8_AON is ok, I have 3.8V PPBUS_AON between 9.5 and 11.5 V USB-C only...

That will not affect data on SSD? You mean ROM backup, right ?

So anything I can try ?

Hello, Macbook doesn't start, 20V, no current almost. q5155(1) sys_detect OL voltage 3.8V q5155(3) sysdetect_l .491 voltage 0V PPVBATAON 12V PPBUS_AON 12.5V PP3V8_AON 3.8 V PP3V3_AON 3.3 V PP3V3S2SW_USB1 3.3V PP5V_S2 5.22V on CC721, PPBUS_AON_3V3S2_VIN_ISNS has 12 V I am poking around to...