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The client had to discontinue the repair .

Hello guys , have an. 820-3476 that would not display. The machine powers up fine and chimes too , but no image. when I power up the machine , just before it chimes I get 5V on L8300 but drops to 0V. EDP_BKLT_EN. LCD_PDR_EN, EDP_PANEL_PWR signals are all not present ... please help heys

Thank you, the job has been discontinued

2informaticos thank you guys,@JohnB8812.. I found a partial short on E8_CC2 through U4700.. and now art works both ways

The board works in the reverse, and charges as well...but then when you plug in a usb drive, it says usb disabled, device is using too much power " also , plugging in a usb device will bring a charging icon on the battery but not actually charging it ... But with a charger, it would charge fine...

have done so but still the same

2informaticos okay , will do now

Good day guys , have got an 820-3662 that initially was no power , however I found that it was missing PP3V3_S0 , I traced that to U8030 found it faulty and then replaced it , afterwards, the board powers on , but would neither chime no display , so I tested with another EFI chip just to be sure...

I did check with a known good port and cable

hello guys have a 820-00045 that would only charge in one direction but not the other way round.

I will also suggest you thoroughly observe the traces, if the machine was working and stopped after your replacement, it could most likely be an issue with traces that was barely hanging on before the chips replacement. be sure all of the chip are properly soldered, and output okay , also make...

the issue was the Trackpad, thank you so much guys .

Thank you so much guys ,

Have got an 820-3535 ... was has a bit of liquid , however it?s been cleaned out . It works not but would occasionally restart by itself, have replaced the keyboard but it?s still restarts, and the time between its restarts varies

double check that its actually 3.2V and confirm pin 3 and 4 of U4404, if you have power going in and the enable signal , that will help you narrow down the issue to that section of the circuit

Yes I did try. But it always return with the same error

Have got a 2016 MacBook Pro Touch Bar with the following error and would not go past it 'A critical software update is required for your Mac. connect to a Network to install this update, your Mac can't be used until this update is installed. I have tried to install the update but always fails...

2informaticos ?Also post exact resistance (ohm scale) between pins 17/18 and 27/28 of U7100? please tell me , you usually ask for this , what?s the intended? Would low resistance here point to a bad ISL or it?s needed for a different section of the circuit ( am trying to understand, do you...

The I2C_IOXP_SCL/SDA drops as you said but that is when the machine is not booted, however for the machine to boot , I will have to disconnect either trackpad or keyboard and the SMC_ONOFF_L goes back up , upon pressing the power button

I2C_IOXP_SCL/SDA = 3.3V stable and SMC_ONOFF_L. = stable at 3.42V Would also add that the Mac only restart when its booting into the OS .. without OS the machine would not restart and the keyboard/trackpad works okay, its also not the drive nor the operating system