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CHGR_ACIN is now 4.48 V after changing the U7100 so at least that is now ok :) Diode mode on ppbus is 0.176 V removed U1900 and measured all the pins and found short on the following pins: 1 , 2 , 5

the exact value is 1.3 Ohm removed the C1910 and the value is the same . Pin 3 on isl in diode mode is 0.003 V Removed C7111 and the voltage did not go up . R7110 is 41.3 kOhm ... a bit low maybe ? I will try to replace U7100 ...... I was completely on the wrong way .... i thought since U1900...

Thank you so much 2informaticos Removed F7140 and i got the correct voltage on C7140 12.58V , and the cpu does not get warm anymore . The board now takes 0.073V And YES the U1900 does get hot !!!! Voltage on pin 1 is 0.226V and diode mode beeeeeeps resistance 17/18 is 3.6 Ohm resistance 27/28...

Hi 2informaticos and all you other nice people well i have a 4924 that according to the customer had some water on it ... I guess she is right but absolutely no corrosion on the board whatsoever. It has green/orange light and the pp3v42 is actually 3.32v (bit low?) and the ppbus is 4.2v and the...

Well what can I say , as usual you are the champ !!!!! It was the C6993 , mark this thread as SOLVED (thanks to 2 informaticos ) THANK YOU SOOOOO MUCH Fixing a board after 2 days can feel better than sex sometimes :)

Thank you 2informaticos for your answer , if you are not here we can close the forum :) I did apply a prayor before but as you said it did not help ? I did heck for short but couldnt find one , the value on pin 3 of the D6905 is very low , I wish a had another working board to see what the value...

Hi 2informaticos and the rest of you nice people :) Well here I am again with my favorite nightmare board , the 3332 .... This time i have a board with some oxidation and no green light at all .... No liquid damage noticed (the sensors still white) , while checking it out on the microscope i...

Hi 2 informaticos took me a day to find another trackpad cable (corona is making it difficult) and just got it and replaced it with a new and exactly the same result ..... I would hate to (try) to replace the keyboard in this model it looks really like a whole night job and the result is not...

Hi 2informaticos yes thats the confusing part , the trackpad works great . Before osx same thing no keyboard , tried to reset smc but nothing ......

Hi to all you nice people I have a 820-00239 board with a non working keyboard , all keys (I mean all) are not responding . The board is like new , no corrosion or oxidation at all . I have seen these boards with some keys not working or sticky or .... but never with a complete keyboard totally...

All 3 coils have the same value 35.6 ohms to ground (L7310 , L7320, L7330) PPBUS_G3H has 0.4 ohms to ground and the other coils are in the kiloohms (around 300 kOhms).... I am beginning to beleive the Jessa conclusion "Its never the coil" :)

Just a small update ... removed all 3 FDMF and short STILL there :(

Thanks 2informaticos yeah I have been reading other posts and usually bad FDMF6808 means dead cpu .... I have removed the first one already and will do the other two as well .... I knew it .... as I said with my luck with all retina 15 boards :) of all Louis videos I have seen I have never...

I will have to change my posts to "Hi 2 informaticos " :) you are the only one replying :) Sorry I couldnt post back yesterday because the option to reply wasnt there . I removed the Phase one FDMF just to see if any change but when I measured the pins I noticed that I have a short on...

Hi to you all :) I have a 3662 with a short to ground on PPBUS:G3H I removed the F7140 to see on what side the short is and with my bad luck it is on the system side .... PP3V42 is ok Any tips on how to proceed ,,,, The board has no liquid damage and according to the owner it just died .... no...

Thank you soooo much 2informaticos as always you are right , after replacing the q7080 everything back to working normal . One more time thanks a lot , much appreciated , you can mark this thread as solved . best regards

Just one small odd thing before I replace the Q7080 , I just made some measurements before and I found something strange , the R7081 measures just fine 62 kOhm R7080 is 4k instead of 100k so I replaced that one with a proper 100k ....as soon as I soldered it on it was back on 4.3k grrrrr so I...

Thank you 2informaticos both the Q7080 and D6910 "look" nice , no corrosion .... the R6912 has 22 kOhms ... Should I replace the Q7080 and D6910 ?

Hi to all nice people I have a very odd problem , on one 3332 board when I connect the charger I get a green light just for a sec and then off . I connected it to the bench power supply to start measuring and the board magically turned on ???!!! I put it back and connected everything and on...

Well now I have really done it !!!! I took out ANOTHER working 00138 board from a completely working computer and mounted it in the clients computer just to be ready in time ... and ..... it is DEAD too !!!! So now I have 3 dead boards 00138 and it is definately something in the clients...