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No liquid damage. Tested another LCD, Reballed VRam, Resoldered and replaced U8900. Just looking for confirmation its a dead GPU?

Sounds good. Gonna quote them a new board and maybe try to fix the old one when I have some free time.

I was assuming CPU failure but was hoping not. Ram chips are under filled on this board.

I have a 820-00875 board that came in for randomly freezing and showing this weird pixilation on the screen. I haven't found a way to reliably cause the computer to freeze. Anyone have any knowledge on what might be causing this and wear to start troubleshooting it? No Liquid or drop damage...

Alright so latest info from customer. Said they bought the computer on craigslist to find out wifi and the battery did not work. Was then taken into another shop for No Wifi and Battery not running off battery but would boot fully to OS. When given back they said it was completely dead and they...

No light on USB mouse. But track pad will click when its drawing 1.4A from USB. And when powered off and opened up it will draw 1.4A as well.

No power was meant to say no boot. But customer says they took the laptop to another shop for the same issue who gave it back as a no fix. They said it just stopped turning on before they took it in. No drop or liquid damage. When I got the device it was missing the battery screw and C3760 was...

Attempted to reset both the SMC and PRAM with a known good keyboard. Does not respond to either fan will keep spinning like nothing happened and continue on the minute cycle.

No previous liquid damage that I can see. Device came to me with no power but appears to have been taken apart before. Will power on with no chime, no image but fan spin and CPU VCore for about a minute then turn off for a few seconds and repeat during this USB imput amperage will drop to 0a but...

So I came into the store today and went to work on it again. And everything else works fine now. I have no idea why but ill take it. Thanks again everyone for the help.

This board is going to make me go insane lol. Replaced U5010 and SMC_ONOFF_L is back to 3.4V but booting into SMC bypass. Replaced SMC again with nothing changed, C5710 and R5070 looked fine but replaced anyways and still nothing. Is it possible my great donor board SMCS are all dead. :confused:

Alright so SMC_RESET is a constant 3.4V But SMC_ONOFF_L is at 2.4V when the machine is off and 1.3V when its on.

U7400 and Clock chip look clean. Tried another SMC and same issues.

Yep. But only when booting into OS X. It will sit on the boot menu screen for hours or in ASD EFI. Another thing weird is it will not show sensor test in ASD EFI.

Yes SMC_BC_ACOK is 3.4v

820-3115 with liquid damage around SMC and SMC_reset. Replaced SMC and it now turns on but powers off about halfway though booting into OS and does not show a green light. Will not turn off if just sitting in boot menu or ASD EFI. Possible Bad SMC?

Wow i was expecting $500 or more. But i want one.

Was browsing Aliexpress today and looks like a 2016 MacBook Pro LCDS are already for sale. Looks like the repair is going to be a lot like the 12" MacBook https://www.aliexpress.com/store/pro...788049808.html https://www.aliexpress.com/store/pro...788804152.html

3.4V on SMC_BC_ACOK

Tested with known good IO board and Cable still the same thing.