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Hi guys, Another MacBook Air - clean, no liquid, absolutely clean board, first person working on it, 820-00164 11" turns on sees battery, does SMC reset if keys pressed, no post, dong, image - doesn't react if trying PRAM, Checked voltages around U6100 and missing SPI_MLB_CLK, traced back to...

That?s great, thanks very much for an update!

Ok great to know Thanks

Well I had a feeling that it needs SMC reset after US cleaner, put everything back in and did SMC and Pram reset, working since, have to mention that either SMC or Pram didn?t do anything before UC was done, So this one is sorted, will leave for testing during the weekend before returning to...

On the first post you wrote that changed out the speakers but did not solve the issue - can you please tell a whole story? So which speakers did work and what did you do to get them work again? thanks in advance ?

Sorry for the silly one, how do I bypass SMC on, by shorting startup pads with tweezers and plugging in Magsafe at the same time?? I?ve nothin else connected to the board apart from display and SSD... Cheers

Well I checked that and didn?t get anywhere, lastly I tried Ultrasonic cleaner, got a fan spin but nothing else, by connecting/disconnecting Magsafe got Mac to boot into login screen, but once switched off same again, only with 4th 5th attempt boots os, SMC??

Thanks very much, I?ll try your suggestion as well as value of the PCH_INTRUDER_L Will reply as soon as it?s checked!

Hi everybody, Well I have 2 identical MB Air boards(820-00165) both came in with no power/dead - no liquid damage or worked on before, clean boards, Checked out all the rails, missing PP5V_S4RS3, traced back by EN signals and missing PM_SLP_S4_L Also checked: PPVRTC_G3H...