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wow I wish I would have tried this much earlier but after replacing all the protection diodes this issue was fixed. Thanks a lot duke.

I hoping I can get this fixed soon. I took these measurements again and here is what I got. PP3V3_S0_AUDIO_ANALOG - 3.25v PP4V5_AUDIO_ANALOG - 4.5v PP5V_S0_AUDIO_AMP_L - 5v PP5V_S4_AUDIO_XW - 5v L6200 - 5v on both sides

Okay I did that and still no speaker audio in OSX.

I put another headphone jack on as well as L6607/08 and the issue still remains. I still get sound when I plug in headphones. I get 0v on L6604/08 and L6607 Diode mode reading of L6607 and L6608 is 0.597 & 1.17v

Is there anything else I can check for on this before I try replacing U6201 again? I'm not very familiar with audio circuit and I can't find much information on the web on this similar issue.

aprendiz dukefawks Any other ideas on this or should I just go ahead and replace the headphone jack? Update: I removed both L6607/08 to see if that would fix this but that didn't solve the issue. I went ahead and just removed the headphone jack but that didn't fix the issue either. Could it...

Not sure what you were asking in the first part but there is continuity from L6604 to L6608. In diode mode both L6604/08 were 0.61v Diode mode of L6607 is 1.09v and on L6608 it is 0.61v

I don't see any damaged components around the headphone jack but is there any way I can check if the headphone jack is the issue without removing it?

I've been doing these tests without the I/O Board plugged in. Does that board matter on these Retina Macbook Pro's?

Okay I replaced u6201 and now I get a chime through the speakers but when I login to the OS there is no sound through speakers and it stays on "digital output". If I plug in headphones it switches to headphones and i can hear sound through them but when I unplug the headphones it goes back to...

I replaced Q7221 and that solved the issue and now this turns on and works fine. Thanks a lot Duke for your time.

Do you have a link to where I can purchase this stencil you use and what size solder balls are best for this chip.

There is not a short on the 5v_s3 rail. In diode mode 5v_S3 is showing 0.153v. In voltage mode I get 0.18v on 5v_S3 and 5.02v on PP5V_S5. Resistance to GND on ENTRIP1 is 78.6 kohms I have already replaced U7200 and that didn't fix the issue. Actually before replacing U7200 a couple of days ago...

I have 3.3v on SLP_S4_L and now I just get 0.18v on 5V_S3 while 3V3_S3 is 3.3v. U1800 is still getting slightly warm. Q7911 Pin 1 - 3.325v Pins 2 & 3 - 0v Q7221 Pin 1 - 0v Pin 2 - 0v Pin 3 - 0.78v Pin 4 - 0v Pin 5 - 0v Pin 6 - 0v

How do you reball it by hand without a stencil? I manually put solder balls on each pad of a donor chip and as soon as I put even the smallest amount of hot air near it the solder balls slid off the pads.

Update: I just touched the U6201 chip after turning the machine on and it gets extremely hot so I will have to replace this chip. I see this is a BGA chip and I don't have a stencil to reball one from a donor nor am I good at reballing these chips. Do you know of a trick or easier way to...

PP3V3_S0_AUDIO_ANALOG - 3.25v PP4V5_AUDIO_ANALOG - fluctuating quickly from between 1.31v to 1.49v. PP5V_S0_AUDIO_AMP_L - 5v PP5V_S4_AUDIO_XW - 4.94v L6200/1 both have correct voltages on both sides of them.

Update: I did some troubleshooting and thought replacing U7200 would fix this but it didn't. I get correct voltages on Pins 8, 13, 16 and 17 of U7200. I get 0v on Pin 1(P5VS3_ENTRIP) and 0.90v on Pin 6. Somehow I still get 2.55v on L7260 even though there is 0v on Pin 1 of U7200. There is 0v on...

This machine doesn't appear to have any liquid damage and the customer says no sound works on here but it does work with bluetooth audio. No ouput or input devices are detected on the sound page. I have done an SMC and PRAM reset but that didn't fix the issue. I tried shorting pins 1 and 2 of...

C1802/03 are both 3.31v. The clock chip didn't have any corrosion around it. I measured and got some more voltages. PP3v3_S3 and PP3v3_S0 are both present. PP5v_S3 and PP5v_S0 are both showing around 2.55v Also, with the charger plugged in for a little while I can feel U1800 getting warm but...