Fix Your Stuff Community Store

Model A2159, EMC 3301. A refresh of the entry-level 13" MacBook Pro. Available in Silver and Space Gray. Released July 2019.

112 Questions View all

Options

EDP cable was disconnected while testing new screen. No image, no bckl

Macbook Pro 2019 A2159 Board 820-01598

EDP cable was disconnected while testing new screen. No image, no backlight

  • Done SMC and PRAM reset. Nothing changes.
  • Tested other functional aftermarket and original screens. Nothing changes.
  • Don’t have other EDP cable for testing.
  • No shorts anywere.
  • SMC_LID / Hall function works as the touchbar works ok.
  • Image fine in external monitor
  • Tested EDP conector and all components.
  • PPVOUT_S0_LCDBKLT: 0v
  • MOSFET Q8400: G: LCDBKLT_EN_L: 12.5v (doesn´t drop)
  • MOSFET Q8401: 0v all pins

But what scares me are this two signals that come from the processor and it’s 0v on both:

EDP_BKLT_PWM and EDP_BKLT_EN

Any ideas?

Appreciate the attention and help

Answered! View the answer I have this problem too

Is this a good question?

Yes No
Score 0
Add a comment

2 Answers

Filter by:
Most Helpful Newest Oldest
Chosen Solution

Options

A sad update:

I measured diode mode on J8500 and found the pin 1 (EDP_AUXCH_N) is shorted to GND (diode mode is 0.008 and should be~0.261).

It is right next to Pin 43 (PPVOUT_S0_LCDBKLT) which is 50v.

The conector, when got loose, shorted these two pins and killed the CPU...

Was this answer helpful?

Yes No
Score 0
Add a comment

Options

Is this a virgin or used display assembly?

Do you have access to the Apple calibration tool? (Only Apple or their service centers has access to it)

Was this answer helpful?

Yes No
Score 0

1 Comment:

Hi Dan! The display was working whilst I accidentaly disconnect the edp cable. And I have other original cracked ones for testing. Same result.

No. No access to calibration tool :(

by

Add a comment

Add your answer

Daniel Calderazzo will be eternally grateful.
View Statistics:

Past 24 Hours: 1

Past 7 Days: 2

Past 30 Days: 6

All Time: 131