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Well, this morning I recalled that after the board working the first time, I applied liberal amounts of IPA to clean it properly. I suspected that the alcohol went under the SMC as well and perhaps relocated some of the dirt that was already parked there. I Reflown the SMC and now everything is...

This one arrived with no green/orange light at all. Physical examination revealed corrosion on C5002. After replacing C5002, I got USB activity and only with a screen connected booted up fine to the flashing question mark. I put the board in a case, connected cables and added an SSD; no boot...

About 0.350V while OBData is around 0.400V

This one came with a keyboard/trackpad failure. Everything else is working. The power button works. Watched Louis' video, tested if holding Option key was helping but no change. Started from the trackpad connector and found out that PP3V3_S4 was reading 2.1V. Traced it to C2952 which was...

Yep, thank you. As you may imagine reflow did not help. I will try reballing next, got paste but no stencil. Trying to find one. Thanks for all the help so far.

Thank you, I will try this. Perhaps rather reflowing, rather than reballing as I don't have balls to do it. Pun intended :) Quick one, is it possible to run diagnostics via D while still doing SMC bypass? Tried but it seems to be shutting down abruptly if I keep D down. Perhaps SMC is involved...

Thanks, PP3V3_S5_AVREF_SMC is 3.3 V

SMC_DCIN_VSENSE = 2.76 V, sorry if I mismeasured this one.

Will do, what value am I expecting to see on SMC_DCIN_VSENSE ?

It is a 45W branded charger which works fine with other a1466s. Tested using lab PSU at 14.5V as well, same behaviour. Does SMC_DCIN_VSENSE : 3.426 V mean DCIN is actually 20.5V ? How do we calculate 20.5 from 3.426 ? Just trying to understand.

Done, all outputs from pages 41-43 are below, taken during a successful boot using SMC-bypass. I was sure I was seeing 1V on SMC_CPUVR_ADJUST_ISENSE on the first test (after multiple measurements), however after a reboot it start reporting 350mV which matches a good board...

SMC_DCIN_VSENSE = 2.7V SMC_PBUS_VSENSE = 1.3V SMC_DCIN_ISENSE = 250mV SMC_BMON_ISENSE = 65mV Also not sure if this helps, but while it is in restart loop (without SMC bypass) SMC_CPUVR_ADJUST_ISENSE_R was cycling between 0.5V and 3.0V. Perhaps a side effect of restarts but wanted to mention.

Sorry, I meant the flex cable between DC IN board and the LB Also I am a bit confused, for example U5490, according to the schematics is a INA211 current sensing amp. But on the board that location is blank (there are pads, but no chip), no signs of it being removed and same on other boards...

Without screen, SSD, flex cable: Permanent green light, full fan speed, no sings of booting, no usb activity Without screen, SSD but with flex cable: Green/Orange light, full fan speed, apple chime, no usb activity With screen, no SSD but with flex cable, Green/Orange light, full fan speed...

SMC_ONOFF_L does not react Shorting R5016 turns the laptop on and off as expected

Hello, Can I get a quick opinion here? A board with water damage mainly around C7002 area, was cleaned up, and resistors and capacitors were replaced. All works fine, other than the power button. I can login, and do everything, every key works but if I shut down, no way to bring it back up...

Hello, 820-3435-A arrived with water damage. The water ingress indicator near J8300 is red. Two pins on J8300 corroded (disappeared) and I found some mild corrosion at Q7706 area. The latter was minimal and looks alright after cleaning with IPA. Two pins missing are pin 3 and 4. Both are PPHV...

You are right, when I saw 500+ mA draw, warm CPU and fan spin I wrongly assumed that the issues was display related. Yes, I measure PLT_RESET_L at 3.3v and if relevant PPVCC_S0_CPU is at 1.8v. How can I further check that the CPU is actually running? Re: Replies, noted, will do.

Good point, no video when I connect a screen via HDMI, so I suppose it is not a backlight issue.

Another 820-00165 When the SSD is removed it boots fine to? folder. However, when I put the SSD in it first goes up to 500-700mA but after about 15 seconds it drops to 25mA and stays there. I am not sure where to start troubleshooting. (SSD is a known good one). Thanks a lot, Max