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12V_G3H is rock solid stable, no shorts in all coils. how do i d a smc bypass mode with an imac??

i meant that i have 3.3V for 3v3_s5 and 12v for 12v_s5 up till when i click the the power button and it blinks. means voltage drops to 0 for both lines and go back to 3.3v and 12v shortly after

apologies, it's 820-3588 Yes I have steady s5 state

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?

that did the trick, i drill it down to SSD issue. Problem is i tried several SSD(apple ssd), known good working and tested with another macbook runs fine! but some of them were not detected at all, getting Folder logo on boot, but found 1 that boots and shut down properly now. SSD Compatibility...

i did a BIOS swap from a donor pile, same result

Tried smc and nvram/pram reset and with an usb Mac os as well..same results. So it does eventually shutdown like 20 min later

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...

All good now :)

sorry for ranting but WTF??? board came from a customer who previously passed to a shop who says can't be fix and needed board replacement. she needed data but sabotaging the board for business? i'll make sure this shop is properly backlisted and known to all local shops and customers to stay...

and i can confirm your statement SPKRAMP_RESET_L is shorted to ground and T2 is glowing like a firefly in the dark

no other component that i can find that are missing related to SSD. when you say Classic SSD failure, the NAND itself fail? i see alot videos with same symptoms but they do a CPU reball instead and SSD is back.

yeap. boards ben sabotage, replaced R7861 and now board now boots up but with question mark folder

unfortunately for me customer is paying alot for data, i will have to even replace CPU if needed. i dug alittle further, found that vcore power was not enabled by u7100. and possible for you to help check if R7861 is supposed to be no stuff or i'm indeed missing a resister there

board came with missing, cd3215. replaced it and i get 20v 144ma on charger. CPU heats up but no CPU vcore resistance on vcore is 8ohm (phase 1 &2). CPU dead?

on the old battery is 0v at the connector but 10.9V at the terminals, guess the battery controller board is dead somehow on the new battery connector 11.3v ppbus is 11.3v and 3v3_g3h is 3.2V i want to add as well that the low battery sign does not consistently come up.. sometimes it does...

Hello, 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. checked...

when u say data lines from audio connector i presume these? in diode mode I2S_SPKRAP_R_LRCLK_R 0.4 I2S_SPKRAP_R_R2D 0.4 I2S_SPKRAP_R_BCLK 0.4 i2c lines are all 0.4 on left and right

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...

all SPI termination resisters and traces are in order.. no other corrosion seen from the original c1801(removed) and Q1840(replaced). J6100 is removed and SMC already reballed. which only left CPU. dead CPU or just reflow?