820-00165 Missing PP5v_S4RS3

patrickribbsaeter

New member
Macbook Air 820-00165

History:
problem with PP3v42 and water damage.


I fixed the problem and put the board into ultrasonic cleaning and after the ultrasonic cleaning, the board doesn't work.

I have:
PP3v42 = 3.42v
PP5v_s5 = 5v
PP3v3_s5 = 3.3v
PPVRTC = 3.3v


PP5v_S4RS3 = Missing!!! 0v

Checking PM_slp_s4 now.. But cant find anything? Yet!
 
Last edited:

2informaticos

Administrator
Staff member
Did you use sweep function of UC machine?

Check the board for knocked off components and broken traces.
UC machine just removes corrosion, doesn't rebuild corroded traces.
 

patrickribbsaeter

New member
Tmr I will buy some new ultrasonic cleaning. To be fair. I had some ultrasonic cleaning inside that might have been old, and i happen to mix it with Isopropanol.. haha.. I know.. Its pretty dumb thing to do..

1. So i guess thats part of it. However I will take John advice and try ultrasonic it again with new cleaning tmr.

2. Will sweep the UC as well for spareparts that might have come off.

Thanks guys, you guys are the best. I revert back here tmr with news.
 

patrickribbsaeter

New member
Problem is solved gents.. Someone mentioned issued with pm_slp_s4. so I started there and traced back.

Was missing pm_slp_s5 rail as well. So i continue tracing back

It was U8020 (TPS22924) Missing 3v output voltage. It had pp3v3_s5 input and pp3v3_sus_en input.

2informaticos and JohnB8812 Thanks for replying back. Enjoy your weeekend
 

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