ipetro
Member
Hello . After replacing the thermal paste, the video is not displayed on the internal display, it is displayed on the external display but hangs on the apple and does not load.
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MacBook A1707 A-00928 stuck logo
- Thread starter ipetro
- Start date
Possibly broken trace, or knocked off components.
Strange to have damaged thunderbolt chip after changing thermal paste.
If there is pure short, you can inject voltage and see what gets hot.
I expect mechanical damage, caused by wrong manipulation.
Do you get 3V3/5V_S0SW_LCD?
If there is pure short, you can inject voltage and see what gets hot.
I expect mechanical damage, caused by wrong manipulation.
Do you get 3V3/5V_S0SW_LCD?
ipetro
Member
PP3V3_S0SW_LCD=3.3v
PP5V_S0SW_LCD=5v
Perhaps the short circuit was and not a consequence of replacing the paste. As I understand it, the PP0V9_TBT_X_SVR line is responsible for outputting the image to an external display, since the external display does not work through this side. it works through another.
PP5V_S0SW_LCD=5v
Perhaps the short circuit was and not a consequence of replacing the paste. As I understand it, the PP0V9_TBT_X_SVR line is responsible for outputting the image to an external display, since the external display does not work through this side. it works through another.
Then that chip is possibly dead.
DP_INT_HPD goes high?
DP_INT_HPD goes high?
You can't get image; LCD isn't recognized by PCH.
Check diode mode on all EDP_INT lines of J8500.
Just in case, test with known good LCD assembly.
Also change the small video cable, connected to MLB (J8500).
Check diode mode on all EDP_INT lines of J8500.
Just in case, test with known good LCD assembly.
Also change the small video cable, connected to MLB (J8500).
Missing DP_INT_HPD implies missing image.
Then you can't expect backlight!
There is no reason to bother with backlight circuit in this case.
Inspect around heatsink's screw holes for damage.
Be sure U9850 area isn't affected.
Then you can't expect backlight!
There is no reason to bother with backlight circuit in this case.
Inspect around heatsink's screw holes for damage.
Be sure U9850 area isn't affected.
ipetro
Member
my EDP measurements
| EDP_AUXCH_C_N | Default | d | 0.408 | |
| EDP_AUXCH_C_P | Default | d | 0.409 | |
| EDP_BKLT_EN | Default | d | 0.495 | |
| EDP_IG_BKLT_EN | Default | d | 0.560 | |
| EDP_IG_PANEL_PWR_EN | Default | d | 0.559 | |
| EDP_INT_ML_N<0> | Default | d | 0.350 | |
| EDP_INT_ML_N<1> | Default | d | 0.348 | |
| EDP_INT_ML_N<2> | Default | d | 0.349 | |
| EDP_INT_ML_N<3> | Default | d | 0.350 | |
| EDP_INT_ML_P<0> | Default | d | 0.348 | |
| EDP_INT_ML_P<1> | Default | d | 0.349 | |
| EDP_INT_ML_P<2> | Default | d | 0.350 | |
| EDP_INT_ML_P<3> | Default | d | 0.349 | |
ipetro
Member
I replaced the U2800 and the MacBook worked. But an external monitor is not useful for running the display. everything works, even sleep. works well until you reboot. It seems to me that there is a problem with switching graphics since the Mac cannot turn on the display on its own until loading starts on the external monitor.
So you get internal video only after external appeared?
Did you check U9850 area?
Did you check U9850 area?