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No, I didn't do that. How can I use this pad if it is under the motherboard when I put it back in the case to connect the battery? Can I use the R8015 component to do this test?

So if I understood your query correctly, you want me to inject 20V on the PMU_ONOFF_L line to see if it tries to turn on. For example on R8015. That's right ?

When the battery is connected to the motherboard, the USB-C meter shows me 5.2V , 0.084 A and 0.44W. I tried to find the SMC_ONOFF_L on the schematic, but I can't find it. Could you please explain to me what it is and what exactly I should do with it ?

Hello, Here are the tension and diode mode requested: PPBUS_G3H : 12,3V 407 ohm 3V3_G3H_RTC_X : 3,3V 093 ohm PP1V8_AWAKE : 1.79V 387 ohm PP3V3_AWAKE : 3.37V 634 ohm PP1V2_AWAKE : 1.19V 524 ohm PPVDDCPU_AWAKE : 0.7V 014 ohm PPVDDCPUSRAM_AWAKE : 0.79V 090 ohm PP1V8_SLPS2R : 1.79V 380 ohm...

Thanks, I will check right now. just, what does LDO means ?

Hello community! here I have a problem with a 15 inch MBP A1707, which does not turn on. I checked the voltage, and it's stuck at 5v 0.02 amps for all charging ports. So my question is: how can I be sure it's the CD3215 chip? And which of the 4 chips is faulty ? There is no liquid...

In this case, for a macbook that no longer turns on, and for which we do not know the exact cause of the short circuit. What do you recommend that I do ? Where do I start to diagnose it ?

Ok, and which software do you recommend for bitmaps and schematics ? Currently I use XinZhiZao and Refox software, do you use another one ? Honestly, I can't tell you more... I'm sorry. What I do know is that this device was dropped off to us for a screen replacement. We tested sending the...

I would really like to repair this macbook but I think I don't have the right software or the right knowledge to do it. So I joined this forum to learn as much as possible. That's why I would like to know what software you used to guide me as our comments ? Because the software I use (XZZ and...

Thanks for your feedback. In this case, what would you do ? What software do you recommend I use to check the diode values? I use XZZ or Refox, but it's incomplete...

Hello, I removed U8400 and I replaced it. Unfortunately the MacBook doesn't turn on. BTW,the diode value are stable : C8440 : 0410 ohm C8441 : 0399 ohm What do you advise me ? How are you able to check the diode value ? I mean, which tool do you use ?

I removed U8400 and the diode value are : C8440 : 0410 ohm C8441 : 0399 ohm Could you please confirm to me that U8400 is the same as the U7700 you are selling here ? https://store.rossmanngroup.com/b4-lp8548b1sq.html

Yes, that's the same diode value C8440 : 0001 ohm C8441 : 0013 ohm

When I remove C8440, U8400 heats up a lot. BTW, I wish you a happy new year 2022 :)

PPBUS_G3H : 435 ohm C8440 : - pin 1 : 0001 ohm - pin 2 : 0000 ohm C8441 : - pin 1 : 0013 ohm - pin 2 : 0000 ohm It looks like the U8400 heats up a lot too.

It seems that the components R8444 and R8445 are faulty because the temperature is very high and their diode value is OL. I'll replace them and check what's going on :)

As I begin, I didn't know what to give you exactly :p In this case, it is better to be too complete than not enough haha About the L7670, the exact ohm value is 0012 ohm.

Sorry, I don't yet have the basics reflex. Here are the ohm : About U7800 : - L7815/L7814 (427 ohm) : loop from 0v to 1v1 - L7816/L7817 (037 ohm) : loop from 0v to 0v9 - L7813 ( 1135 ohm) : loop from 0v to 1v8 - L7823 (no stuff, 1700 ohm) : loop from 0v to 0v1 - L7806/L7807/L7808/L7809 (009...

About U7800, it seems all coils are ok. About voltage, - L7815/L7814 : loop from 0v to 1v1 - L7816/L7815 : loop from 0v to 0v9 - L7813 : loop from 0v to 1v8 - L7823 (no stuff) : loop from 0v to 0v1 - L7806/L7807/L7808/L7809 : loop from 0v to 0v75 - L7811/L7812 : loop from 0v to 0v82 - L7810 ...

Yes, both are stable. No loop, no variation