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Why don't you just buy a couple of complete microphones on Ebay, they are like 4$.

You know this is a 13 inch board? And yes it was as originally water damaged

Shouldn't matter if the charger can handle more than 60W. If I was using a 45W charger, then it could be an issue.

Yes, a genuine Apple 85W charger, SMC_ADAPTER_EN =3.39V

Both sides the same 0.106, which is what I get everywhere i measure PM_SLP_S3_L when i press the power button. It raised from 0 to 0.1V when button is pressed. One more thing i wrote the wrong value i the first post it should be 0.078-0.1V.

I get 1.057 here

Got one more of these old 820-2530 boards. I have all main power rails and I have PM_SLP_S4_L. When pressing power I only get 0,78V on PM_SLP_S3_L should be 3.3 I think. There is no short to ground and all the enable resistors and capacitors on this line is fine. Is this bad SMC?

Ok, thank you

One more question here, I have a cracked but functional 13" 2011 monitor, can I use this when testing display output across all models or do I need to change the LVDS cable between +-2013 boards?

I had some time again to look over this board, and I have come a bit further, I still can't get it to go into an S0 state. Both Q8150 and U8160 where missing pads. R8165 was open and Pin 6 on Q8150 was missing. Do anyone have any clue on what to check for next?

Well, it turned out it was U7500 that caused the problem, replaced it now and all good... Thank you for sending me in the right direction Dukefawks

All right, I guess I'll be buying the Rigol then

That's what I was thinking, then I'll just have to figure out how and which one :)

Have an older MacBook Pro with 820-2530. The board measures fine as far as I can tell, but I don't get ALL_SYS_PWRGD On U7870 Pin 3, 5 and 6 all measures the correct voltages but Pin 8 is at 0V I have some difficulties figuring out how the ALL_SYS_PWRGD circuit works, ca anyone enlighten me?

Ok, so I measured quite a bit now. It seems I have all main power rails except S0 rails.

Ok, so my best bet is an Oscilloscope then. The ones who do use an Oscilloscope, what frequency range should i aim for?

Thank you, but if you could get away with a multimeter, how do you check for clock signals?

I have tossed out my old 1970's Oscilloscope because it took up a lot of space on my desk. I'm now looking for a new one. Any suggestion on what to buy? Don't want to spend more than I need :)

Not shure, the only thing I have replaced is U3210 because it looked nasty

I have now got 3.3 on PM_SLP_S4_L