3 MacBook no video output
I didn't use my 2017 13" MBP for a while and now that I wanted to use it again I encountered some problems.
first of all it has developed so severe flexgate that the internal display is completely unusable and it is in weird state where it doesn't truly turn off (when I hold the power button the display and trackpad turns off but when I turn it back on it starts really quickly and doesn't do a boot chime)
When I plugged it into my monitor (LG Ultrafine, so definitely not the cause of the problem), it turned on but didn't get any signal (panel is turned on but black).
It showed the battery empty sign so I let it charge (on its brick not the monitor, even tough that normally works), after a couple hours on the charger it was really hot, so I decided to let It cool off, but after I returned a while later its fan was maxing out and it was still very hot.
That's when I decided to open it up and unplug the battery, but even after that it still didn't work with the LG, so I plugged it into my TV with a dongle and recived a signal, but only when the dongle was actively powered.
The signal sadly was only the low battery warning again, so I plugged the power (which was previously in the dongle) directly into the Mac but after that I never got a signal again.
after all that I decided that the data on the Mac ist lost anyway, so I tried to factory reset it, due to the flexgate I can't do it on the device itself so I plugged it into my 2021 MBP but when the MBP or the LG is plugged in I can't wake it and therefore can't get it into DFU mode.
Edit:
It now boots again and the flexgate is back to what is was before (1/6th of the screen is black compared to weird glitching all over)
This is the report it produced: MCA Error Report
this is the report from coconutbattery (it is fluctuating quite a bit: shortly after the screenshot it went up to 70%).
it obviously is far from ideal but it shouldn't cause such an issue and it isn't physically swollen
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@simontt - What happens when you put the lid down when plugged into an external display does the external show the same incomplete image?
из Dan
@danj now it launches clamshell mode, but previously it just delivered some sort of signal to the monitor without actual video so clamshell mode wouldn't trigger, since it didn't really have an external display connected
из Simon Nattrodt
Without a monitor how can you see the display image?
The only thing you could do is do a remote connection to the system but that only proves the CPU its self is working. It doesn't isolate if the internal display is nor if the CPU's graphics engine is either.
I think you are dealing with a bad display assembly, the T-CON fails which is common in this series.
из Dan
just to clarify:
it now works again.
running the battery dry caused it to somehow glitch to a point where Its screen glitched out and it didn't output any video or sound.
I am not sure exactly what let me reinstall MacOS but some part of, disconnecting the battery sensors (or whatever the battery cable is called) charging it, disconnecting the battery, charging it, connecting the battery sensors, charging it, connecting the battery, charging it, sure did it.
из Simon Nattrodt
@simontt - Then your battery needs to be checked! Let’s get a better view of things, install this gem of an app! CoconutBattery take a snapshot of the apps main window and post it here for us to see Adding images to an existing question
из Dan
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