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I've been in denial thinking that the SMC was shot... *sigh*... on to the next one. Thank you for your help.

No boot and no Green light. One wire has 3.42v at u6900 pins 1,4 and 5 u6900 has 3.42v at pins 1,2,4 and 5. 3.42v at pin 14 u7000 so I have SMC BC ACOK.

No doubt. I'll start over and see what I can find. I did find a bad R7261 pin side was broken off. weird. I'm not sure if that was an original problem or the result of my shorting out the other resisters. I measured at those resistors because they were ones that show up when searching for...

PPBUS_G3H "was" stable at 12.6v until I shorted r5301 pin 1 and R5312 pin 1,, now the 12.6v is dropping slowly... no green light any more... $##%!^&#@^.... Previous to my shorting the to resistors.. I had 0v at PP5V_S3.

Yes. at u4900 pin 119 3.3v-.099 R7941 3.2v-.007

yes at R7941 3.3v - .007v at R7940 3.3v-,014v at U4900 pin 119 3.3v-,014v

PP3V3_S5 is pulsing but much less voltage: r7940 1.002v - .002v R7812 .998v - .003v BTW thank you for your help. I'm sure that much of this is a pain in the *ss for you but the assistance you offer is very much appreciated.

So following G2_EN. At R7940 the voltage fluctuates from 3.4v to .003v rapidly.

Checking it at u4500 pin 3 It reads .088 which I guess is nothing. c4501 the same .087 u4350 the same .087 c4350 also only .087

Q4260 pin 4 is 12.57v and pin 3 is 12.24v

Interesting R4260 and C4260 have 12.59v so does Q4262 pin 4 4260 in 1,2,5,6 have .03v each. F4260 is also .034 both sides.

PPBUS_G3H at R5400 and R5410 is 12.59V

5V_S3 at l3408 0v R4532 0v U4600 pin 5 0v 3V3_S5 C4605 0v C9841 pin 1 Fluctuates from 1.01-.0046 U9480 Pin 5 Fluctuates from 1.01-.0046 SMC_ADAPTER_EN u4900 pin 64 3.3v R5074 3.4v

Yes to the know good 85W OEM charger. PPBUS_G3H at R5400 and R5410 is 12.59V F7040 and F7041 12.59v

This board looked very clean. There was corrosion on J3500 pin 16 but no where else. I used the USC anyway but I couldn't see any other issues. I'm not sure where to find the course of the PP5V_S0 but after looking and looking It seems to come from U9500. There is no 5v coming from here. No...

and yes, I lost the green light sooooo... I somehow blew the U7000 or something else blew it. learning these circuits is such a pain in the arse but the good side of this is that this is how we learn to understand the circuitry in a very comprehensive way. :)

Badly soldered or a bad U7000. My soldering may not be a work of art but I have checked each solder point for a secure solder and pressed down firmly on the chip as I was placing it (as Louis suggested in a video) so,... Either the U7000 is bad (this last one a used one) or my solder work sucks...

So does this mean that yet another... 4-5 u7000 chip is bad?

Replace Q7080. I now have 5v that drops to 1.2v on Q7080, Replaced U7000 3rd time with one from another board. The new ones i have been using dont seem to make a difference. Now I am back to having low voltage on pin 3 of U7000. R7005 16.2v R7051 1.2 R7052 1.3 R7021 1.2v R7022 1.4v R7010...

Probably that damned U7000... I'll swap out the Q7080 and recheck the resistors around it. Thank you.