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While testing the voltages, U7000 stopped working again. I got 20.2v on pin 10,15,20 before it stopped. I ordered two U7000, so I guess I'll be changing it again

I'll check the voltages into U7000 then.. problem is, I'm not 100% sure what they are meant to be for some

Ive taken F7000 off the board to see if PPBUS_G3H fluctuates on the pin one side of the fuse when its not continuing on to the system. Its still fluctuating but not as much (or my meter can't see it) it looks like its going from 7v to 12.95v repeatedly

ALL_SYS_PWRGD is jumping from 0v to 3.2v continuously also

20.3v dcin now though :)

Replaced U7000. Getting 5v on VDDA & VDDP now. Still have an issue with PPBUS_G3H as it?s jumping between 3.6v and 12.95 continuously. I can?t get it to start in SMC bypass either, I just get a fast fan for 2 seconds and it goes off again

Now to find a UK supplier of the chip :p

What should VDDA and VDDP be showing as? I'm assuming SMC_AUX_OK should be outputting something also but it looks like that needs 3v3 too

Okay.. I'll give that a go.

Thank you 2informaticos.. Pin 10 - P_IN = 5.16v Pin 18 - AUX_DET = 1.28v Pin 2 - VDDA = 1.39v Pin 17 - VDDP = 1.39v Pin 28 - SMC_AUX_OK = 0.0v

Pin 27 on U7000 is a direct connection to Pin 2 of R6991 from what I can tell. As I'm not getting anything on R6991 I wanted to look at U7000 to see if it is even getting the voltages it needs, but I'm not good enough at understanding the schematic just yet. Could someone better than me let me...

PP3v3_G3H isn't present on charger (expected) or on battery. Both show 0.0v Its near on impossible for me to test around U6990 on battery but on the charger I get 5.2v on D6905 pin 2 5.1v on pin 3 On D6990, I get 5.1v on pin 2 but 0.0v on pin 10 enable.

I get 5.2v on both ports. The charge ports look perfect, all the fuzzy coating came off in the UC and no pins etc are burnt or tarnished. Any ideas?

I had an A1466 in the other day that was apparently needing a replacement main board (according to another repair shop) they wanted to replace the board for ?450.. It came to me for a second opinion and turned out to be a ?5 trackpad ribbon. They were charged ?49 ($65 USD) in total by myself...

When the battery is connected, I get 12.6v on PPBUS_G3H.. 0v when only on the charger though

After the board went through the UC, it actually looked great. Obviously something is bad but all the liquid damage appears to be at the DC end of the board

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I always take photos of the board before starting anything like UC.. would they help at all?

No different after the SMC reflow

Ive got a constant 5.2v on dc in now also