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PPBUS_G3H 9V PPVIN_G3H_P3V3G3H 14.63 --HS_COMPUTING_ISNS 9V PP3V3_G3H 3.29 --AON 3.3 --RTC 3.28 PP5V_G3H_LDO 4.97 --S4...

Another thing that I must take into consideration is that I did use a different SMC on my last placement. So it could have also been just the wrong SMCs.

*** SOLVED *** Ok, I finally got it. Put some more solder mask under the SMC. Sound working again. I knew it was the f-ing SMC. I just knew it!

Ok this one is back in. I've got some more SMCs (the correct ones this time). And still the issue is the same. No audio. I am thinking the surface of the board has been worked too much and they balls underneath must be getting together somewhere underneath. I have put some solder mask on parts...

Fixed. I had a lot of work and lots of other questions. But I have figured them all out. Thank you Duke. I apologize for being brain dead sometimes. Overworked, fatigued & stress I start to get stupid real fast. Been on this one for 5 days and finally got it : ) But thank you for pointing me...

I know I need to go back and check my ISL and current sensing resistors. I did change ISL and resistors were way bad. I need to recheck the second set. I think it was around 3.0Ohms, so I assume they were good.

820-2936 Water damage. Have made lots of progress. PPBUS_G3H is 3.23V. I don't have my 3.3V rail, but do have PP5V_S5. I notice if I diode mode to ground on L7220-1 I get 0.130. I have changed Q7220 and also changed U7200 a couple times. Once I change I do my diode mode reading and something...

I also found out that by lifting leg 2 that it has to be less than 1V, or anything higher it will go to ground : ) (I didn't actually lift the leg, I just removed the whole thing and soldered with all 3 lifted and solder blobed 1 & 3 to the board leaving 2 NC).

Can't you go by the numbers on the chip and match to the schematic? I've been using these piles of chips before and haven't had any issues. I just try another SMC until it works. LOL. But I do understand this can probably cause major issues. Duly noted. I will leave them on the board for now on...

Ordering some more donors. I'll get this sucka, I will.

I get same results no matter which SMC I use.

It seems if I lift leg 2 and put 1.5 on it also turns it ground. But if I leave the leg up then the voltages go through. Is line suppose to be 0V on leg 2? & why is 3.4 coming from the SMC?

I see is LM4FSXAH5BB. I just put it on and still no audio. Are the DCIN and flexs differ as well? The rest of my chips are EH & BH I believe. I only have one AH. Same symptoms no matter which : (

I will try to find an identical 000165 SMC, I have 2 dozen SMCs here that match that dot pattern. I just need to figure out which is which.... I had no idea they were different !!! I will try that !!!

Removing R1921 does not work : (

! I was going to experiment by removing those 2 resistors, but haven't yet. Let me try !

Wait a minute... The SMCs are different? I have just been matching up the dots on bottom and assuming they are the same...

Just can't figure out why pin 2 is high at 3.4. Can I do some fancy jumper or add a resistor or something to trick it to work?

I've done my research already on this issue and others with the same issues were never resolved. I know it has something to do with the SMC.

I have this MB that came in stone dead several weeks ago. There is no water damage. When I checked the rails I found there was no S4 rail. So what do I do when I see there is no S4 rail? Change the SMC. I changed the SMC and all was good. Customer comes back in a few days crying there is no...