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unfortaunalty it measures around 1.7ohm on both cpu dead? makes sense as one of the mosfets was missing when it came in so previous guy took a look and it is same scenario.

now voltages are present on u5110 but no fan spin no boot. i was probing around on u7100. i might of accidentally bridged pin 12-11? could this be the cause?

its not there. this is s5 line? so even with charger it should be readable?

:p:p:p:p hahahahaha

ok ran asd and got many errors. SMC 0x0 -- smc critical sensor Temperature (THSP) -- Thunderbolt Proximity (test #1) Temperature (TM0P) -- MLB top side Temperature (TW0P) -- Airport proximity Temperature (Tm0P) -- Memory proximity

I ran techtools PRO but no sensor errors, i really want to get to the bottom of this so i will get hwmonitor and run that too. thanks

L7210 1.1ohm l7230 1.4ohm l7290 25.4ohm l7410 10.8ohm l7430 10.8ohm l7900 446ohm l7960 112.5ohm l8000 185ohm l8050 152ohm

yes I have also removed u7800 but i will check mosfets.

reflowed smc still spinning hard :(

thanks for all your valuable input. i can easily get things off the board at 350c, i use hakko fr-810b. I am just suprised there could be crap under smc as this has no previous history of water? but who knows? i checked out the mlink 853a, that is very cheap! I have been looking at using...

anyway to test?>

and also what is the best way to reflow smc? 350c? 7/10 airflow? should i remove silicon?

ok another issue i noticed, when battery is disconnected and reconnected. when i plug in charger fan will spin then turn off it will repeat this and on the 3rd time it will turn on and chime? is this normal?

hmmm no caps getting hot. anything else you can recommend?

no errors in asd? crazy?

ok tried thermal cam and freeze spray. done the entire board both sides no go. i have previously removed some components that i have yet to put back on in pursuit of finding the short. PPBUS_S5_HS_COMPUTING_ISNS is 3.4ohm short to ground.

slowly increase then stays high.

John must i use freeze spray?

ok. short is not on ppbus_g3h its on PPBUS_S5_HS_COMPUTING_ISNS

hey all i got a macbook air and although works fine fan spins up - just after boot. Fan connector looks good - no damage. I have tried another fan. I have tried another io board. R6060 R6061 R6065 R6010 all measuring good Q6060 been replaced twice. what am i missing? thanks