The fan spins briefly after pressing the button. If it spins, it spins quite slowly, I'd say it's inaudible. I also tried putting the board in a different case with a different screen, trackpad, keyboard, etc. It made no difference....

I measured [B]ALL_SYS_PWRGD[/B] (on R7806) at [B]3.19V[/B]. When measuring, the battery was not connected and I saw fan spin.I measured [B]ALL_SYS_PWRGD[/B] (on R7806) at [B]3.19V[/B]. When measuring, the battery was not connected and I saw fan spin.I measured [B]ALL_SYS_PWRGD[/B] (on R7806) at [B]3.19V[/B]. When measuring, the battery was not connected and I saw fan spin.I measured [B]ALL_SYS_PWRGD[/B] (on R7806) at [B]3.19V[/B]. When measuring, the battery was not connected and I saw fan spin.I measured [B]ALL_SYS_PWRGD[/B] (on R7806) at [B]3.19V[/B]. When measuring, the battery was not connected...

I removed [B]F7000 [/B]and noticed a very low resistance on L7420, L7410 and L7430 (all were at 0.4 Ω). The rest seemed fine. I then removed L7430 and L7410 (read about it on another post). After removing [B]L7410[/B] I noticed that the short was gone. I thought this could mean that [B]U7410[/B] was dead. So I decided to replace [B]U7410[/B] with a chip that I got from a donor board. After replacing it the short was gone!

I plugged in the ammeter and it showed that it was pulling a few hundred milliamps. PPBUS_G3H was also back at 13V. I decided to put it back into the case and test...

Hello everyone,

I have a A1708, 820-00875, in front of me that doesn't turn on and my ammeter says 20V and 0.0185A. The person I bought it from told me that it turns on occasionally but crashes and after that it's hard to get it to power on again. So far I couldn't get it to power on at all. I opened it up and removed the logic board. I measured 0.015V at PPBUS_G3H with a resistance to ground of 2.2 Ω. I then measured the resistance between PPBUS_G3H and L7420, L7410 and L7430 and those are basically all shorted at 0.4 Ω. The resistance for all the other inductors seems fine....

I tried the voltage injection at L7690 but my power supply can't do more than 3A. It was near impossible to spot or feel anything heat up. I also tried pouring some IPA on the board but it didn't really help. I think I saw the alcohol evaporate a tiny bit quicker near the PCH, but it could just be my mind thinking I saw that because it seems likely to me that there's a fault there. I will try to borrow a FLIR camera next week and have a better look at it. I'm doing this purely as a hobby project and to learn a thing or two so there's basically nothing to lose at this point. I will update the post...

Here are some measurements. The ones I left out were all super high resistance, usually in the MΩ range.

[TABLE="border: 1, cellpadding: 1, width: 150"]
[TR]
[TD]L7430[/TD]
[TD]2.1 Ω [/TD]
[/TR]
[TR]
[TD]L7410[/TD]
[TD]2.1 Ω [/TD]
[/TR]
[TR]
[TD]L7420[/TD]
[TD]2.1 Ω [/TD]
[/TR]
[TR]
[TD]L7210[/TD]
[TD]4.1 Ω [/TD]
[/TR]
[TR]
[TD]L7370[/TD]
[TD]6.5 Ω [/TD]
[/TR]
[TR]...

Hello everyone,

I've recently acquired a 13 inch MacBook Pro 13 2017 (A1708, 820-00840-A). I bought it with the intention of trying to fix it and learn a thing or two about electronics repair along the way. So I've never repaired or even had another MacBook or Apple product before actually. However, I do have some experience with designing and producing my own PCB's so I do have some equipment like hot air station, oscilloscope, microscope, hot plate, etc at home. Today I received my USB ammeter and got to work.

The USB ammeter first showed 5V and after a few seconds...

Hey, I'm Twan from the Netherlands 👋.