Recent content by students_t

Ok, I think I follow what you are getting at. The A1706 has two hard drive SSDs I guess (as shown in pic)? So I would need to be changing both? Edit: basically, this video () talks about T1 and T2 macbooks. In the case of T1 macbooks they don't explicitly say if the "direct transplant" method...

Sorry, I must have had a typo or be misunderstanding something. I currently have three A1706 boards—one is a scrap board, one is a board from my old laptop, and one is a board from a laptop I just purchased. I want to remove the 512 GB SSD from my old laptop board and use it to replace the 512...

The main 512 GB drive.

I ran into some problems cleaning up the pads where U7800 goes; I will try fixing this (I've been a little busy lately), but I have an alternative that I want to ask you about. I joined this forum because I wanted to learn about electronics repair with practical experience (already a success)...

OK, with U7800 removed: Location Diode mode reading Ω C7880 (PP3V0_G3H) 0.436 1– (no reading) C7840 (PP3V3_S5) 0.321 1– (no reading) C7833 (LDO3V, PP3V_PMICLDO) 1. (no reading) 1– (no reading) C7836 (LDO5V, PP5V_PMICLDO) 0, beep 1.0 C7837 (VINLDO3, PPBUS_PMIC) 0.419 1– (no reading)...

I only checked diode mode before resoldering on the ones that I mentioned on Saturday (sorry about the "V" here, just leaving it as quoted)—

I tried removing and re-cleaning the contacts and then reattaching U7800. I now get the following readings: Location Diode mode reading V C7880 (PP3V0_G3H) 0.400 2.75 C7840 (PP3V3_S5) 0.322 3.36 C7833 (LDO3V, PP3V_PMICLDO) 0.380 3.31 C7836 (LDO5V, PP5V_PMICLDO) 0.001 beeps 0 V C7837...

C7833 (LDO3V, PP3V_PMICLDO) shows 0.9 Ω C7836 (LDO5V, PP5V_PMICLDO) shows 0.9 Ω C7831 (VDD5_VPROGOTP, PP5V_PMICLDO) shows 0.8 Ω C7830 (VDDIO0, PP3V3_PMICLDO) shows 0.9 Ω

I could certainly believe there being bad solders. I diode mode I get: C7833 (LDO3V, PP3V_PMICLDO) shows 0 V and beeps C7836 (LDO5V, PP5V_PMICLDO) shows 0 V and beeps C7831 (VDD5_VPROGOTP, PP5V_PMICLDO) shows 0 V and beeps C7830 (VDDIO0, PP3V3_PMICLDO) shows 0 V and beeps

PP3V3_S5 at C7840 shows 3.36 V C7833 (LDO3V, PP3V_PMICLDO) shows 0 V C7836 (LDO5V, PP5V_PMICLDO) shows 0 V C7837 (VINLDO3, PPBUS_PMIC) shows 13.11 V C7831 (VDD5_VPROGOTP, PP5V_PMICLDO) shows 0 V C7830 (VDDIO0, PP3V3_PMICLDO) shows 0 V

OK, I've swapped in the U7800 from my scrap board, and now the voltage for 3V0_G3H is up to 2.77 V. Still not 3 yet though. What do you think?

Got it; thanks for letting me know. And thanks for still providing the useful advice just now, even though it is beyond the scope of what this forum is supposed to be about.

OK, so I found this example video of changing a PMIC []. I'm having a hard time hearing the audio of the person in the video, so I apologize if I missed something that was said. I just want to walk through my understanding of the steps to do this--please tell me if any of this is wrong, or if...

Location Voltage (V) RTC_RESET_L (at R1531) 2.61 PCH_SRTCRST_L (at R1530) 2.63

OK, I think the problem is that some solder had drifted over to around C1225/R0862/R1453; I was able to clean this up somewhat, although C1225 came off in the process. The reading for 3V0_G3H is now reading 2.64 V again. So now, regarding the main problem being U7800 or U0500, how should I go...