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Thanks for the reply 2informaticos. It?s an 820-00923-A unfortunately as I believe that?s the first of no schematic territory :(

Hi, I have an A1706 that has been given a little drink at the side of the keyboard right where the SSD chip is. Turns on but doesn?t see the SSD I took the board out and cleaned the small amount of crap near the SSD. Put the board back in and checked it. Now it sees the SSD, boots and runs...

Well, someone switched my good battery and I wrongly assumed the voltage was being pulled down :o Turns out it needed a new battery :p Sorry for wasting your time folks.. thank you for the help

Thanks for the reply JohnB8812 - Yeah I forgot to mention I checked 7005/6 they both check out fine 9.9ohms, 4.8ohms Thanks 2informaticos R6950 is good at 10.01k Q7155, battery only, not in chassis (F7140 still removed) = pin 5 = 3.197v pin 1,2,3 = 3.178v < took a while to climb to this...

R7150, 7151, 7152, 7120, 7121, 7122 all test fine CSON,CSOP 17-18 on U7100 = 3.1ohms CSIN,CSIP 27-28 on U7100 = 19.9ohms SDA,SCL 10-11 on U7100 = 3.99k

Hi, I have a 820-3437 MBA that came in as not turning on. (no liquid damage but just didn't turn on one morning) Found a shorting cap C7431 (PPBUS_S5_HS_COMPUTING_ISNS) Thought it was going to be very easy as it was replaced and diode tested okay. Turns on now and boots, sees the battery serial...

Actually it does work when I short pin 5 to ground.. new keyboard it is then 2informaticos Thank you for your help

Shorting pin 4 and 5 on the keyboard connector doesnt seem to work nor does shorting pin 1 of the non existent SW9988 Edit: For anyone else reading this, SW9988 pin 1 doesn't seem to have its pad connected to SMC_ONOFF_L so it doesnt work as a replacement for a power button when shorted to...

Seems the keyboard is interfering. If I disconnect the keyboard, it turns on fine and stays on. Power button held on maybe. Anyone know what to short to trigger the equivalent of pressing the power button? I don't have a spare keyboard for this model.

Damn it.. I get noise to say the charger is plugged in and an apple logo for 1 second :mad:

I started testing all caps and resistors on the PBUS side between U7000 and F7000, found R7062 (which should be a 1ohm 0201 resistor reading as 147ohms so U7000 probably thought there was a ton of drain with that at 147ohm. Swapped R7062 out and now I have a solid 12.95v on PPBUS_G3H up to...

If you mean 3v3_g3h on pin 30, that is stable at 3.396v SMC_Reset_L is also stable at 3.396v I can't see anything wrong around U7000 R7020 is a stable 20.2v on both sides

LX1 Pin 31 is fluctuating between 0v and 36mv LX2 Pin 6 is also doing the same Thats only with a multimeter though so it may be jumping higher but its too quick to catch

VDDA Pin 2 - 5.02v VDDP Pin 17 - 5.02v PPDCIN Pin 10 - 20.2v TBA_CSIR_N Pin 15 - 20.2v TBA_CSIR_P Pin 20 - 20.2v TBA_AUX_DET Pin 18 - 5.01v SMC_AUX_OK Pin 28 - 3.396v

New one on and back to 20.2v but still have PPBUS_G3H fluctuating on pin 1 of F7000

The other one was giving a happy dance while reflowing so it should have been okay solder wise.. I probably poked something I shouldn't while testing I imagine

Tried that but no change. Just trying the second one now

While testing the voltages, U7000 stopped working again. I got 20.2v on pin 10,15,20 before it stopped. I ordered two U7000, so I guess I'll be changing it again

I'll check the voltages into U7000 then.. problem is, I'm not 100% sure what they are meant to be for some

Ive taken F7000 off the board to see if PPBUS_G3H fluctuates on the pin one side of the fuse when its not continuing on to the system. Its still fluctuating but not as much (or my meter can't see it) it looks like its going from 7v to 12.95v repeatedly