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does shortenings the on/off pads not same as SMC BY PASS ?

S3 AND SO PULSES WHEN I TRIGGERED ON/OFF PAD , PIN 3 OF U1950 PULSES and no signs of corrosion , L7310/20 all pulses when I trigger on/off pad ... I could not find a short on the output

ALL_SYS_PWRGD pauses , L7560 is steady 3.3V, L7430 pauses as well, ( when I trigger SMC_ONOFF). On page 58 non of the SO RAILS are present , 3. 3V SUS , is present ,3. 3V S4 is present ., 3. 3V S3 SWITCH is 0.063V on page 58

@2infomaticos okay, will do now

2informaticos Thank you so much, the machine worked , R1619 was 2.5V thank you everyone

820-00165 MISSING PM_SLP_S4_L however when I trigger the on and off pad L7520 spikes to 5V , any ideas what that means or where I should look further ?

Thank you so much , will also refrain from the above

9Yes with trackpad connected, Diode mode to ground is OL

Also when I use an external keyboard trackpad it works in EFI

On U4810 PIN 1 = 3.3V PIN 2 = 0V PIN 3 = 0V PIN 4 = 0V PIN 5 = 3.3V PIN 6 = 0V PIN 7 = 0V PIN 8 = 3.3V TPAD_SPI_IF_EN_CONN circles between 0v,1v,2v when the keyboard is not connected , but straight 0V after connecting the keyboard

Thank you so much 2informaticos and John .. I will post the value you requested tomorrow , we are closed now .. I appreciate your help

yes, and still same thing , Sorry for my late response

Hello guys , please I need your help, have got a MacBook Air 11inch whose keyboard/trackpad will only work in OS and the keyboard fan runs in full speed. HISTORY : initially the machine would intermittently switch off , so I had to replace the SMC and it works except the issue above, so I...

Thank you for your response ... Resolved

2informaticos said

hello guys ... Please I need help on this one .. have got an 820-00165 that is missing PM_SLP_S4_L , however its not completely missing but sitting at 0.9V .... Other rails other than the S4 are present . any hint guys ?

Whats the history of the machine ? Liquid damage ? its very uncommon to have that on the 2015 15 inch :: Tha MacBook Air you did a reflow I suppose was a 2011, which was most likely the PCH and the reason why it came back .. Please confirm you have 1.5V Supply for the RAM

its definitely repairable, I would suggest you make some measurements when the backlight is not present , so we can first establish a state , Foe example , check for backlight output voltage , that will give you an idea of the circuit state , you should not give up on Backlight repairs, as its...

GUYS, below is one of the work done we send out to clients after completing their jobs , please advice me on the format , and how I could make it better , Thank you so much Repair Summary For MacBook Air Liquid damage No Power This was a board level repair> During the course of our...

I would suggest you grab U6100 from a donor board just to rule out the SPI ROM CHIP and then see if it still stays the same.