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Hi, here are all values I noted. PPDCIN_G3H 16,5V PP3V42_G3H 3.42V PPBUS_G3H 12,56V PPVRTC_G3H 3.3V PP5V_S5 5V PM_SLP_S5_L is missing (0V) so S4, S3 and S0 versions of PP5V are 0V PP3V3_S5 3.3V PP3V3_SUS 3.3V PP3V3_S4 0,446V S4_PWR_EN is missing (0V) because of PM_SLP_S5 missing PP3V3_S3...

Sorry I was tired. I mean ohms instead of volts! Resistance on ISL6259 pins 17/18 is 25,5 ohms and 5,5ohms on pins 27/28. thanks

Thanks JohnB8812 and 2informaticos, Didn't yet replaced smc. Always using original 85W magsafe 2 for magsafe2 power jack boards. Should had mention I've already checked isl6259 pin 17-18 and 27-28 they are normal 25,5V and 5,5V. AVREF_SMC is present at 3,3V. CHGR_A/BMON are 0.031V and 0.053V...

PPBUS_G3H: 12.56V PP5V_S5 5V PP3V3_S5: 3.3V PPVRTC_G3H: 3.3V normal green/orange magsafe light No further power rails present. U1900 seems ok, I can see 32KHz present, SMC_ONOFF_L, SMC_RESET_L present at 3.3V Found a very small micro greenish spot near smc, cleaned it and reflowed SMC but...

You are so right. After a fresh look this morning I found out an open trace on SPI_CS0_R_L, R6120 was not anymore linked with R6110. All other trace were fine, I had a test point still with gold color but with a tiny corrosion on the begining of the trace, barely noticeable, This was enough to...

I give up on this one. Reballed smc same, replaced it same again. checked again u1900 u1950 and ultrasoniced the board.

Yes I tried 100% known working bios coming right from a working board. I do have pulse as well on pin3 U1950. Will reflow/ultrasonic/reball smc and report back. Thanks!

No finally machine still does'nt run fine..It looks like problem appear whenn it's on iGPU when I switch to Dgpu fan is quiet, when I switch back ti IGPU fan goes crazy...

This board has PPBUS_G3H, PP3V42_G3H and PPVRTC_G3H. PP5V_S4RS3 is pulsing, ALL_SYS_PWRGD and CPU_VCORE as well. It does'nt start in smc bypass mode. PM_RSMRST_L, PM_PWRBTN_L, PM_BATLOW_L, PP3V_SUS are all present. Replaced Bios just in case and checked all 22 resistors. Checked U1950 and...

Here are my findings: Good board: iGPU: GPU current 0,09A fans spin quiet dGPU: GPU current 7.02A fans spin quiet Bad board: iGPU: GPU current 5,84A fans spins high dGPU: GPU current 7.03A fans spin quiet Now I am a little bit ashamed about something: ssd was empty and I decided to install a...

I got another 820-3332 and I compared again the values with Hardware Monitor, here are the results: Bad board SMC_GPU_HI_ISENSE 0,46V on boot menu 0,127V when OS is loaded GPU current: 6A 2nd Good board SMC_GPU_HI_ISENSE 0,35V on boot menu 0,04v when OS is loaded GPU current: 0.08A First good...

I am sure HWMonitor default at 13,60V because battery was missing. I didn?t bother with that as I had the same value with known good working board. Will post values asked as soon as I am in front of the board. So far the only obvious difference I noticed is the current gpu sensor. thanks

SMC_GPU_HI_ISENSE is 0,46V on boot menu When fan is not high. It is 0,127V when OS is loaded and fan full blast. Unfortunately I don?t have anymore the known working board to compare. Will report as soon as I have another one:( I still need to check U/R5410 and circuit. Will report asap. thanks

Hi 2informaticos, thanks for your support, I tested with a 60W charger and have the same issue. I tested also the 85W charger on a known identical board and it still report 20.4V however one big difference I found was for the GPU. on the known working board GPU current sensor is only showing...

I am using only original 85W magsafe 2. Yes same with only battery on. it starts gradually after logged in. if I close the lid laptop goes to sleep, when I open it back, few second good and then again will gradually increase to full blast fans.

Hi 2informaticos, I tried removing all cables including the camera cable and still making fan very high when mac Os is launched same with different os or usb drive or internal ssd. please see attached picture or under this link image of sensors on Hardware Monitor, to me nothing seems strange...

This board had u8900 issue and was booting to black screen, it had also high fan spin before I even touched it. I fixed the video issue by soldering and reflowing the U8900 ISL. It is now displaying image but it has fans spinning very loud only after booting to OS. I tested different internal...

This board doesn't have liquid damage, PPVCC_S0_CPU is present but stuck at 1,7V, processor is very hot, not sure if it's normal on these iPad boards...Don't have hope for this one, but maybe you can suggest to check something. Didn't post voltages since I saw PPVCC_SO_CPU present, but let me...

Hi Thanks both of you JohnB8812 and 2informaticos I replaced Q7180 and what an amount of crap I found under the mosfet!! it was clean outside, somebody cleaned the board and it's an apple refurb board. So maybe the voltage of the 85W charger was enough to drive the gate but not with 60W and...

Hi 2informaticos will do as adviced and will report. For the charger I am really not sureeI have a box for macbook air 13'' and the space for the charger in the box is only the small 45W... Anyways its having this behaviour with both 60w and 45w original magsafe... Thanks again!