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Sorry for the confusion, let me clarify. Of course I'm using my PSU in CV mode - at first set fixed to 1v. I just need to set an upper limit for the amps, because my PSU can only detect overcurrent when I set that limit, because mine does not do it by itself. I do not use a CC PSU - I just set...

I tried to inject voltage to PPBUS_G3H Yesterday. As recommended i started with 1v and set a limit of 0.5a at first. With 1v injected nothing could be observerd. My lab bench power supply was showing that no power was consumed at all. At best i get a reading of 0.001a on my PSU but most of the...

Sorry, I did not reply earlier, I could not access the site on the weekends.There was an SSL error or something. Anyway .... in addition to the F7000/1 fuses I removed the F8400 fuse too and checked L350 and LB700. Their values are roughly the same: 0.5 to GND in diode mode 1.5 mohms to GND in...

I checked L9080 and L9580. Both of them have the same values: 0.51 to GND in diode mode 0.46 to PPBUS_G3H in diode mode 2.5 mohms to PPBUS_G3H in resistance mode 4 mohms to GND in resistance mode If i measure in resistance mode, the Resistance decreases slowly. E.g. if i measure and have 4...

It is 86 ohms for the L8102 and 89 ohms for LA850.

Nope, no power was applied to the board. I would not even dare, until I'm not at least 70% sure that nothing blows up or you advise me to try. I rechecked all big coils. The only 2 candidates that came close were L8102 and LA850, measuring 0.052 to GND. Everything else was far beyond or above...

Ok got it. Do you have any advice for me, what I can try to do next to find the error on PPBUS_G3H, or should I wait until the new IC arrives to replace it first?

I suppose that's with the U7370 soldered back onto the board? Because without the IC I got 0.08v to PPBUS_G3H and 0.02v to GND in diode mode. Currently, I can not check with the IC in place, because it takes some time for the chip to be delivered. Edit: I guess you meant PPBUS_G3H to GND -...

"The problem can only come from a coil with very similar reading; and not bigger at all." I think I can see the reason for that now that I looked at the schematic again. At first I measured 0.02 ohms between PPBUS_G3H. I managed to remove the U7370 (Although it was very hard because it felt...

I measured all of the really big coils. I have some results, but I'm not sure if that's what you had in mind. (mostly because I don't know what is big for you) The most suspicious ones were L7701 with ~ 80 ohms and L8102 with ~60 ohms. I also found a coil sitting between GPU and CPU L7330...

Thank you for your Answer and for clarification. There are a few things to that I need to ask. Im using ZXW and when looking at the available lines I only have a 3V3_GHT_T line. I don't have any other. Are they the same ? Furthermore, I removed the Fuses as you told me, and I measured from the...

Hello there. I'm new to this Forum and I don't know if I'm in the right place to ask. I'm working as a forensics examiner for smartphones. I'm very familiar with Smartphones but not with Macbooks, so please be kind to me as I'm trying to learn to repair macs now. My colleague dropped a Mac on...