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Got an iMAC where the first LED Blinks on button press but not turning on.
Its not Q8450 and i have steady 12V
I'm not getting pm_slp_s4_l and not pulsing either.
is the criteria for s4 en same as macbook?
Macbook air 2017 initially came in with no boot, troubleshoot and found that SSD was dead. had it replaced and when running diagnostic and other stuff found it was laggy when on battery. found out Battery connector was broken. now also notice that the macbook will not/takes a long time to shut...
820-01958 came in with a water damage at the titan ridge area, surrounding area cleared up.
macbook now boots with battery but not charging. 20v when plugged in charger but 20ma. customer took back macbook for data backup, brought back laptop with depleted battery to be fixed.
i have an 820-01814 which has water damage at the speaker right AMP area. that was cleared but one of the amp u6500 was roasted and cannot be fix, pads on the chip are gone(this can't be replaced right?). i have not replaced it and left it off the board
right now board takes 20V 20ma and does...
Originally board hard short on ppbus at C7314. Replaced to remove short.
now board without SSD 90% of the time boots and shows no hdd icon. 10% just won't boot.
with SSD, sometimes chime with fan spin and dies.
tried with external USB bootable. fan spins and dies before apple logo.
I have an 820-3476 that initially had short on ppvcc_s0_CPU. removed the damaged cap C1008 near the cpu without heat.
no more shorts but still does not boot.
i detected pulsing voltage when plugin in magsafe from s4 all the way to all_sys_pwgd. no other shorts found so far.
I have a 820-4668 not booting, after a few measurements, don't see obvious short or any heating.
I have the 1st LED but when pressing power botton has no reaction.
my confusion is that in no_boot state i have S5 state power rails(which i do have). but the board is pushing out...
hello, i a MBP touchbar A1706 not turning on
No liquid damage of any kind. or any shorts
20V on charger
PM_BATLOW_L is 0V
32MHZ and 24MHZ present (verified with Oscope)
PM_PWRBTN_L reacts if you trigger SMC_ONOFF_L...