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ahhh that makes a lot of sense. so basicly its pulsing becasue it was power cycling. so i was barking up the wrong tree. thanks for the assistance. learned something today.

ppbus 8.62v AVREF_SMC - stable 3.298 SMC_RESET_L - stable 3.383v board is alone with i/o board flex and fan connected. checked all the big coils and found a short on L7502. i found the bad cap c7550. was a crack in the middle. surprised that i didn't see it on visual inspection. i now...

board was liquid damged around smc area. i have reballed smc and now have orange/green light i have 3v42 and ppubs. i am assuming that this is not turning on because all of my 3v3 lines are pulsing. could you help me figure out why 3v3 is pulsing. could this be because the smc is bad...

i took the tbt rom off the good side and it read fine. then took it off on the bad side and its not reading. xgpro says unknown chip. i've double checked the soldering job and wires. so i'm assuming this is the issue. i want to make sure this is the correct chip off digikey. once it comes...

only difference was on pin 31/33. on the 20v side diode reading was .309 on 5v side was .9 so that pin goes to u3000, i changed it and still same reading. do you want all the readings? second question is this the 1v1 lDO: PP1v1_UPC_XA_LDO_BMC if so i'm not getting 1.1v on any of these lines...

board came in with no power not drawing anything on usb monitor. opened up and UB300 was all wavy/bubbly. replaced it and now that side draws 5v .25amps. the other side draws 20v and ramps up to .3amps then resets once and finally goes to 0amps. first time working on one that chip...

dfu restore fixed issue. laptop is booting fine now.

following directions on apple website: https://support.apple.com/guide/mac-help/start-up-your-mac-in-safe-mode-mh21245/mac im holding power button but as soon as it chimes computer restarts, not getting “Loading startup options” just tried target disk mode and backed up his data. could this...

laptop came in with 5v not upvolting. checked the cd3215c's and r3169 has a bit of corrsion. cleaned it off and now its upvolting to 20v drawing 1amp. put the logicboard back in housing and i get a chime, but as soon as it boots to ssd it resets. i can hold option boot and it stays on, but...

there were plenty of 8gb ram upgrades but that wasn't what i was looking for. i wanted 16gb ram upgrade. i only found one guy who did it on youtube which is why i asked the quesiton. Anyways, i think i ordered the correct ram (not sure becuase the video wasn't that high quality) and followed...

bumb

Is it possible to upgrade 00165/00164 to 16gb ram? I've been done 8gb but these days on newer os they are running pretty slow. I have a 4gb 00165that customer sold to me instead of fixing and wanted to upgrade to 16gb if possible. If it can which ram type do i need?

I don't have a good board to test on :( only donor board that a bunch of parts are taken off of. here are the diode values of j6100. pin 26 (mesa enable) is ground. i'm assuming this is a dead t2. have 2 questions. is it possible to be anything else besides t2? and second question is it...

was water damaged around audio ic/headphone jack. board was very clean no corrsion. was only getting 5v until i swapped out the cd3215 and now i have 20v .07amp draw. it is not turning on.

just for an update on this case. i ordered a donor board and dioded tested all the pads comparing to the working board. found a reading that was off and found a resistor that was not to spec. replaced it along both chips and now have speakers. moral of the story is test all the lines :)

is the same issue on this board. is there any way to test to make sure t2 is bad? should i take u6400 off and test the lines?

Just trying to understand here. if t2 was damaged wouldn't that stop the laptop from powering on? and second question. Since c6406 was short to ground (PPBUS_G3H_SPKRAMP_LEFT) wouldn't that have stopped power from going to t2?

Came in heavily corroded. I ultrasonic cleaned and reaplced both bad CD3217 and now computer is turning on. everything is working execpt there is no sound. sound is being detected in system prefs but sound is coming out of speakers. i found a couple of shorts around u6400 so i removed it and...

both are pulsing

pin 7 pules pin 3 pules as well